The Effects of Strategic Bombardment Upon the German Home Front: 1942-1945.


By:

Joseph Trnka

Department of History, University of San Diego,

San Diego, California

14 November 2022



The concept of total war, as practiced in the modern age, holds that a worker on the Home Front is as important as a soldier on the Battle Front. Without the worker to produce the munitions, the soldier could not prevail. While modern total war has its origins in the American Civil War of 1861 to 1865, it was not until the Second World War, when long-range, multi-engine aircraft capable of carrying large bomb loads became available, that significant force could be applied directly to the Home Front. The German Home Front became an extension of the Battle Front in 1942 with the initiation of a campaign of sustained strategic bombardment. This campaign, begun by the British Royal Air Force, was joined by the United States Army Air Forces in 1943. This sustained strategic bombardment offensive placed great strain upon the German Home Front and made a significant contribution to Allied victory during the Second World War.

While balloon equipped observation units served in several campaigns as early as the American Civil War, aviation was first used to a significant degree during the First World War. During the war, fighter, observation, and bombardment units equipped with aircraft, balloons, and zeppelins were deployed in great numbers. Imperial German air units attempted to conduct a strategic campaign against the United Kingdom, bombing targets from both zeppelins and aircraft. These attempts were largely ineffective due to limitations of the technology.

Postwar military theorists, such as Italy's Guilio Douhet, predicted that modern bombers would always get through to their targets. These bombers, it was predicted, would devastate enemy cities with explosive and poison gas bombs. Civilian casualties would be so great that wars would be ended even before the armies could take to the field.1

When Nazi Germany began rearmament in the 1930s, one of the first goals was to build a strong Luftwaffe, or Air Force. The Luftwaffe was organized and equipped to support the Wehrmacht, or Army, in the new lightning warfare tactics known as Blitzkrieg. German industry provided tactical bombers, dive bombers, and fighters which were equal to any in Europe. The Luftwaffe was a tactical air force designed to attack targets directly in support of ground units or targets immediately behind the front lines, such as airfields, supply depots, bridges, and troop concentrations, again in direct support of the ground offensive.2 When Germany launched the invasion of Poland, the air tactics employed provided devastating results, the Polish Air Force and Army were shattered. During the defense of Warsaw in the fall of 1939, German bombers raided nonmilitary targets in order to pressure the surrender of the city, even though Germany, like all European powers, had forsworn the use of bombers against civilian targets. Likewise, the city of Rotterdam was devastated in Spring 1940 during the German invasion of the Low Countries and France. Overall, German air power was critical to the German defeat of France and the occupation of Western Europe in Spring 1940.

By Summer 1940, the Wehrmacht was poised on the English Channel, ready to invade Britain. The Luftwaffe needed to seize control of the airspace over the landing beaches for the invasion to succeed and initiated an aerial campaign against the Royal Air Force, which came to be known as the Battle of Britain, on 13 August 1940. The Luftwaffe conducted an intensive campaign against Fighter Command of the Royal Air Force, attacking airfields, radar sites, command and control centers, and aircraft production plants with such intensity that the British air defense establishment nearly collapsed.3 With destruction of the Royal Air Force nearly in hand, Adolf Hitler ordered the Luftwaffe to turn its attention to London and bomb the British into submission.

On Saturday, 7 September 1940, the Luftwaffe began the first of 57 consecutive days of raids on London. At first, the raids were predominantly daylight ones against strategic targets. As losses mounted, however, the raids switched to night bombing raids against the London urban area. Given the limitations of both aircraft and navigational systems, the Luftwaffe was forced to conduct inaccurate area attacks against London and other British cities. The citizens of London were the first inhabitants of a modern city to undergo systematic bombing over a long period of time. Some urban areas received as many as 31-52 bombs per 100 acres. These bombs were either high explosive or incendiary and ranged in size from small, 1 kilogram magnesium/thermite incendiary bombs to 1,000 kilogram "Hermann" and 2.5 ton SC 2500 "Max" bombs.4 The courage of the citizens of London and all of the affected areas of Britain was reflected in the fact that they withstood a aerial assault that their prewar government assumed would shatter their will to resist. The bombing, if anything, galvanized public opinion and actually strengthened British resolve to resist the continued attacks of Nazi Germany even though Britain, with the exception of the Commonwealth, was without allies after the fall of France in spring 1940.

The German strategic offensive against Britain failed due to inadequate technology and insufficient numbers. The Luftwaffe had entered the war with bombers and fighters designed to attack tactical targets. The bombers did not have the payload or the defensive firepower and the fighters did not have the range to properly conduct a carefully conducted strategic bombing offensive. Hitler gave up on the invasion of Britain and turned his attention once again to the East. The same problems which had plagued the campaign against Britain also presented themselves the following year when the Luftwaffe was unable to attack industrial targets in the Soviet Union.

The Bomber Command of the Royal Air Force was the only way for British power to be brought directly to bear on Germany. However, Britain was under tremendous strain during the early years of the war and was unable to fully develop its bombardment offensive. In December 1941, a raid on Hamburg cost Bomber Command 13 aircraft of 129 dispatched.5 However, by May 1942, Bomber Command was able to mount a 1,000 aircraft nighttime area raid on the Ruhr city of Cologne. In ninety minutes on the night of 30/31 May 1942, 1,500 tons of bombs fell on the city. According to historian Earl Beck, "The bombings were to prove damaging to the houses and buildings of the cities but took a relatively minimal toll of people and had a relatively insignificant effect upon war production. The bureaucracy made heroic efforts to deal with the bombing damages as they occurred. But behind the figures lies the story of lost homes, of constant fear and uncertainty, of the movements of thousands of people to unfamiliar places and often ungracious hosts. Each bomb that fell shrieked the words "defeat," although those beneath the bombs scarcely dared whisper it."6

The bomber offensive continued throughout the summer and fall of 1942, with Bomber Command conducting area attacks against many of the cities found in the industrial heartland of Germany, the Ruhr. By September 1942, the Ruhr city of Duisburg had suffered a lost of over 98 per cent of its housing space. By Christmas 1942, food shortages were occurring in Germany. Sugar shortages were avoided by the importation of 110,000 tons of sugar from Hungary, 750,000 tons of wheat from occupied Polish territory, and sunflower seeds from the Ukraine. The potato harvest, on the other hand, was good enough in 1942 that the weekly ration was increased from 2.5 kilograms per person to 4.5 kilograms per person.7 These food shortages, however, were not directly the result of the bombing offensive of 1942. Rather, they were more the result of the overall effects of the war on the German economy.

The United States entered the war in December 1941, but much like Britain, was busy dealing with the attacks by Imperial Japanese forces in the Pacific and German submarines in the Atlantic. Additionally, the development of a strategic bombardment force takes considerable time to create; aircraft have to be built, crews have to be trained, bases have to be constructed, and tactics have to be developed. By December 1942, however, General Henry H. "Hap" Arnold, Commanding Officer of the US Army Air Forces (USAAF), was advocating the establishment of an overall air command for the European and Mediterranean theaters of operation which would coordinate the strategic offensive against Germany.8

The British campaign of nighttime attacks continued while the USAAF daylight forces gained strength and developed tactics in attacks against targets in occupied France. By mid-1943, however, RAF Bomber Command was ready to apply maximum effort to Hamburg, Germany's second largest city. On 24 July 1943, 740 British bombers raided Hamburg. Good accuracy was achieved, with 306 bombers dropping their payloads within 3 miles of the target. The raid was also the first use of "window," which was aluminum foil dropped to jam German air defense radars, drastically reducing their effectiveness. On 25 and 26 July, American bombers raided the harbor area of the city. On 28 July, 722 bombers returned and ignited a firestorm in the city, killing untold thousands of its residents.9 Bomber Command returned on 30 July when 700 bombers struck Hamburg. The final raid, on 2 August, was the least damaging, only one-half of the 740 bombers dispatched found their targets due to bad weather.10

By 1943, American bombers were leaving their shorter-ranged escorts behind as they penetrated deep into Germany. On 1 August 1943, 177 bombers from five bombardment groups (two from the Fifteenth Air Force and three from the Eighth Air Force) raided the Rumanian oil refineries near Ploesti, 54 aircraft and 532 crew were lost. On 17 August 1943, 376 bombers of the Eighth Air Force attacked targets in the Regensburg and Schweinfurt area, 60 were lost. The Eighth Air Force revisited the Schweinfurt area with 291 unescorted bombers on 14 October 2022 and again suffered the loss of 60 bombers. Though heavily armed and armored, the American bombers could only repeat the lessons previously learned by both the Royal Air Force and the Luftwaffe, unescorted bombers conducting daylight raids suffered unacceptable losses.11 Many Germans, upon viewing the massed American formations flying over their country in the broad daylight, assumed initially that the aircraft must be German. Despite the losses suffered by the Americans, their effort had an enormous impact upon German public opinion.

On the night of 17/18 August, RAF Bomber Command struck the German V-weapon installation at Peenemunde. While the strike cost 40 bombers, it set German progress on the V-1 and V-2 weapon programs back one year. RAF Bomber Command then initiated a series of raids on the Berlin area with raids on 1 and 4 September 1943. Bomber Command dropped 2,200 tons of bombs on the area but was unable to ignite a firestorm in the city. Also raided were the cities of Munich, Dusseldorf, Mannheim, Ludwigshafen, Hannover, Hagen, Kassel, Leipzig, Nuremberg, and Stuttgart. By November 1943, Bomber Command listed 19 German cities as virtually destroyed, 19 as seriously damaged, and 9 more as damaged. Damage was repaired much more quickly than anticipated, however, and Allied aircraft faced more opposition rather than less. The heavy bombing had not succeeded in reducing German production.12

Guy Sajer, a Frenchman serving in the Wehrmacht on the Eastern Front was on leave in Germany in 1943 and was caught up in a raid on Magdeburg. He wrote, "On one of the buildings I could make out a white poster with black letters: SHELTER: THIRTY PERSONS. Never mind if there were already a hundred! I ran down a spiral staircase between the only two walls left intact in the building. A dim lamp which some thoughtful soul had hooked to the wall lit the turns in the stair. But after two spirals the way was blocked by a large gray cylinder, which was even taller than I. I tried to squeeze through the narrow gap next to the stair wall, but a closer look at the object made my blood freeze, I was pressing myself against an enormous bomb, whose broken wings indicated that it had crashed through every floor of the building from the roof down." Sajer also observed, "The sound of thousands of panes shattering simultaneously added a crystalline note to the huge shock produced by bombs of four and five thousand kilos."13

In autumn 1943, General der Jagdflieger, or General of Fighter Aircraft, Adolf Galland briefed Hitler and Speer that some Allied escort fighters had been shot down over the city of Aachen in western Germany near the Belgian border. Galland warned Hitler of the consequences should the Americans field longer range escort fighters capable of accompanying the bombers deep into Germany. The head of the Luftwaffe, Hermann Goring, had been denying to Hitler that such escort aircraft existed and later berated Galland in front of Speer, saying, "I hereby give you an official order that they [the aircraft] weren't there." Unfortunately for the Luftwaffe, long-range P-51 Mustang fighters began arriving in Britain in large numbers by late 1943. The first of the Mustangs appeared over Germany on 13 December 1943. On 6 March 1944, 730 Eighth Air Force bombers struck at Berlin, escorted all the way by the new Mustangs. While the Americans lost 69 bombers, this was a 9.5 per cent loss rate, compared to the 18-20 per cent loss rate suffered during the strikes against the Schweinfurt area in August and October 1943. Meanwhile, the escort fighters began taking a greater toll of the Luftwaffe. German fighter losses rose from 30 per cent in January 1944 to around 50 per cent in May and June 1944. Between January and May 1944, Jagdwaffe, the German Fighter Command, lost 99 percent of its pilot strength with 2,262 killed or wounded out of a total strength of 2,283.14

In April 1944, the Fifteenth Air Force, then operating out of southern Italy, began conducting an air offensive against oil targets. Between 5 April and 19 August 1944, oil targets in the Ploesti region were struck a total of 19 times.15 Overall, the tempo of aerial attacks increased rapidly in 1944, with the American forces capable of conducting several massive raids per month. Often, due to weather, these formations were forced to bomb through cloud cover through the use of radar. This lead to a greater dispersion of the payloads and effectively reduced many precision attacks to area ones.

In the second week of August 1944, German Minister of Munitions Albert Speer and General der Jagdflieger Galland were ordered by Hitler to stop all fighter production and switch to production of anti-aircraft artillery instead. This order was rescinded by Hitler on 24 August when he approved Speer's request for limited fighter production. Speer conveniently interpreted Hitler's approval as meaning that Germany would produce as many fighters as could be produced, constrained only by the ability of the German industry to produce these aircraft. At a meeting of Speer, Galland and representatives of the German aircraft industry on 24 August 1944, Speer stated , "By sending the production of fighter aircraft soaring, we can meet the greatest danger we face, the crushing of our armaments manufacture on the home front."16

By late 1944, evacuations from both east and west were causing overcrowding in many parts of Germany. By 25 December 1944, there were 590,918 requartered persons in the Wurttemberg- Hohenzollern region alone, one month later this number had risen to 736,488.17

German industry received a respite from the relentless attacks when the Wehrmacht launched its last-ditch counteroffensive against American forces in the Ardennes region of Belgium in December 1944. In what became known as the "Battle of the Bulge," German ground units penetrated deep into Allied lines and caused considerable difficulty for the Allied armies. In order to draw pressure off of the ground troops, the strategic bombers were diverted to strike transportation and supply centers in western Germany, thereby slowing up resupply of the German ground forces.18

The assault on the German transport system did, however, yield tremendous benefits. The German railway system had been under great strain ever since the invasion of France in June 1944. Tactical bombers and fighters had been engaged in an ongoing offensive against the German rail system and had significantly reduced the its overall strength. When the strategic forces were diverted to strike at transportation targets in order to decouple the German offensive in the Ardennes, it began to collapse. Coal shipments fell to 39 per cent of normal for hard coal and 16 per cent of normal for brown coal. By 25 December 1944, 1,100 trains and 75,000- 100,000 cars were idled. By 18 January 1945, the number of idled trains had risen to 1,994. Car turnaround times rose from 6.5 days per car to 20 days per car by January 1945 and lines were cleared by the drastic expedient of derailing idle trains. On 19 January 1945, an embargo was placed on all cargo except Wehrmacht and coal traffic. Dispersed industry suffered, power generation was cut, and iron and steel production plummeted by 60-80 per cent overall. The collapse of the transportation led to a collapse in the production of ball-bearings and a serious plunge in overall weapons production.19

On 12 January 1945, the Soviet Union opened up its winter offensive. By 31 January, significant advances were made and Soviet forces were on the Oder River only 45 miles east of Berlin. American and British desired to assist this offensive by destroying transportation centers serving the Eastern Front, thereby preventing the rapid movement of troops between sectors and the deployment of troops from the Western Front to the Eastern Front. A combined British and American campaign against Berlin had been planned in the summer of 1944 in response to the German V-1 campaign against London. This campaign, known as Operation THUNDERCLAP, was not carried out due in part to American opposition to the concept of terror-bombing. Rather, the plan had been filed away for reconsideration until the situation in Germany deteriorated to such an extent that one large blow against Berlin might shock the government into surrender. With the German collapse on the Eastern Front, reconsideration was given to initiating THUNDERCLAP. While many top American officers were opposed to the concept of terror- bombing, it was recognized that big raids on Berlin, Leipzig, and Dresden would disrupt the German ability to defend the Eastern Front. Adding pressure to the consideration of THUNDERCLAP was a formal request made by the Soviet government at Yalta to strike both Berlin and Leipzig. On the night of 13/14 February, 796 British bombers released 2,646 tons of bombs, including 1,181 tons of incendiaries, on the center of Dresden. Meeting little opposition, a technically perfect fire-raising attack was conducted. By the early morning of 14 February, a fire storm engulfed the center of Dresden. Shortly after noon on 14 February, 311 American bombers dropped 771 tons of bombs, including 294 tons of incendiaries, on the Dresden marshaling yards. Later that same day, 211 more American bombers, unable to strike their primary target, the synthetic oil plant at Ruhland, diverted to their secondary target, Dresden. An additional 461 tons of bombs, all high explosive, were dropped on the city. Due to the presence in the city of thousands of refugees, slave laborers, relocated persons, and even Allied prisoners of war, an accurate accounting of the casualties was impossible. Estimates of the death toll ranged from 35,000 to 250,000. Damage to the city's residential areas was great and the industrial and transportation establishments located within Dresden were destroyed.20

The collapse of Germany during the final months of the war saw the Battle Front move through the devastated Home Front. The Ruhr city of Duisburg suffered its 299th and final air raid on 29 March 1945 only to be subjected to artillery fire on 30 March. As Allied troops entered Germany, they encountered a wide range of resistance from the German cities. Karl Kaufmann, the Nazi leader of Hamburg, arranged to surrender the city to the advancing British forces after learning of the destruction caused by the resistance of nearby Bremen.21

The firm control exercised by the Nazi party over all aspects of the lives of the German people was very important in their ability to resist the effects of the bombardment. According to the United States Strategic Bombing Survey, completed in September 1945, "The mental reaction of the German people to air attack is significant. Under ruthless Nazi control they showed surprising resistance to the terror and hardships of repeated air attack, to the destruction of their homes and belongings, and to the conditions under which they were reduced to live. Their morale, their belief in ultimate victory or satisfactory compromise, and their confidence in their leaders declined, but they continued to work efficiently as long as the physical means of production remained. The power of a police state over its people cannot be underestimated [emphasis added]."22

To conclude, a quote from the United States Strategic Bombing Survey, "Allied air power was decisive in the war in western Europe. . . Its power and superiority made possible the success of the invasion. It brought the economy which sustained the enemy's armed forces to virtual collapse, although the full effects of this collapse had not reached the enemy's front lines when they were overrun by Allied forces. It brought home to the German people the full impact of modern war with all its horror and suffering. Its imprint on the German nation will be lasting."23


 

Notes

1. These pessimistic attitudes resulted in many problems when the war started. In the early weeks of the Battle of Britain, the British government found that there were more than enough shrouds in which to bury the anticipated dead, however, there were no plans prepared for the evacuation of the unanticipated living.

2. Air power can be applied to attack either tactical or strategic targets. Tactical targets are generally found in the vicinity of the front line and are directly involved in supporting or supplying ground forces in the field. Tactical targets include airfields, supply centers, bridges, troop mobilization centers, and road and rail systems. Strategic targets, however, are generally found far behind the front lines and are industries vital for a country to engage in modern warfare. Strategic targets include aircraft and vehicle production plants, munitions plants, shipyards, oil refineries, power plants, chemical plants, and transportation systems.

3. Robin Higham, "The Royal Air Force and the Battle of Britain," in Case Studies in the Achievements of Air Superiority, pages 130-140. By early September, the German attack had the Royal Air Force on the ropes. Losses in the previous two weeks had been 200 aircraft more than had been produced and reserve aircraft were at an all time low of 127. Pilot losses were heavy as well, with over 300 lost during August alone. Of the 1,000 pilots in Fighter Command at the start of the war, only 250 remained. Had the German offensive continued, Fighter Command would have run out of aircraft. The diversion of attention from Fighter Command to London, although costly in terms of civilian casualties, gave some respite to the British defenses and allowed them to be rebuilt. An excellent overview of the Battle of Britain is available in Case Studies in the Achievements of Air Superiority prepared by the Center for Air Force History in 1994.

4. Len Deighton, Blood, Tears, and Folly, pages 391-395. Other German bombs included oil- filled Flammenbombe, benzene-phosphorus Phosphorbrandbombe, and modified sea mines deployed via parachute as aerial land mines. These mines were detonated by barometric pressure fuses and were designed to explode above ground to cause widespread damage.

5. Deighton, L. Blood, Tears, and Folly, page 597. Apparently, the December 1941 raid on Hamburg had little effect on the city.

6. Earl Beck, Under the Bombs, pages 1-9. The first 1,000 aircraft raid was intended more to boost British morale than destroy Cologne. In order to get the number of aircraft dispatched to the 1,000 mark, Bomber Command dispatched nearly every aircraft they possessed and even borrowed aircraft from Training Command and Coastal Command in order to make their mark.

7. Beck, E., Under the Bombs, pages 19 and 72. The British area attacks were a result of the lack of reliable navigational technology to guide the bombers to their targets. Pilots, flying at night, had the option of relying either on celestial navigation or dead reckoning, neither of which were very accurate. With the advent of radio navigation and, later, of aerial radar bombing systems, pilots flying at night could at least find the cities, although they still could not accurately bomb them.

8. Robert Futrell, Ideas, Concepts, Doctrine, pages 148-149. In the 1941-1942 time frame, American planners contemplated the early initiation of sustained air offensives against both Germany and Japan. These plans did not, however, accord overriding production to the respective air forces for the undertaking of these offensives. Instead, the strategic planners posed requirements for the development of land, sea, and air forces to accomplish a series of surface campaigns designed eventually to culminate in invasion of the German and Japanese homelands. The strategic planners recognized the need for the invasion of the enemy homelands, strategic bombardment to them was a way to increase the friction of war upon the enemy economies and make it more difficult for them to produce and deploy weapons for use against Allied forces. American strategic planners had one purpose, how to win the war with assurance and the fewest American casualties.

9. A firestorm is a phenomena where the fires burn so hot that the thermal plumes they generate draw air into the fire from outside the burning areas. This air rushing into the fire thereby feeds the fire and increases the intensity, which then increases the thermal plume. The cycle continues to increase until the fires consume all flammable material in the area. In a true firestorm, such as the one in Hamburg, surface temperatures easily exceed 1,500 degrees Fahrenheit. Due to the winds blowing towards the center of the fire, however, the phenomenon does tend to be self- limited to a certain degree. Destruction is virtually complete and even people in deep shelters are killed, either by heat or more often by suffocation. European cities, with their many stone buildings and wide streets, were generally not prone to firestorms. The most devastating firestorms would actually be ignited in Japanese cities. During an early fire raid on Tokyo, in March 1945, over 15 square miles of the city were destroyed and over 90,000 people perished.

10. Beck, E. Under the Bombs, pages 65-75. The aftermath of the Hamburg raids convinced Field Marshall Erhard Milch, Reich Director of Air Armament, and Albert Speer, Reich Minister of Munitions, that greater attention must be paid to the defense of the homeland. They advocated defense of the homeland even at the cost of the aerial coverage of the battle front. They also advocated the all-out production of the Me-262 jet-engined fighters and the V-1 flying bombs.

11. A detailed discussion of the American daylight bombardment campaign can be found in Carl A. Spaatz and the Air War in Europe (1993).

12. American and British strategic planners could not explain how German fighter and anti- aircraft strength could be increasing given the increasing tempo of air attacks. What they had no way of knowing, due to their lack of strategic intelligence, was that the German economy was only then being placed on a complete war footing. Much of the destruction caused in 1942 and 1943 was offset by conversion of the industry from consumer goods and civilian items to war materials. For example, even though the country had been at war since 1939, civilian automobiles were still being produced, in limited numbers, in 1943. Conversely, the United States terminated the production of civilian automobiles in 1942, after being at war for less than six months. Quite simply, the German economy had a lot of slack in it and was able to increase production of war material even though increasing damage was being done by the strategic bombing campaign.

13. Guy Sajer, The Forgotten Soldier (1967), page 135. The largest RAF bombs from the start of the war until 1942 were 900 kilograms in weight. By the summer 1942, the largest bombs had increased to 1,800 kilograms and to 3,600 kilograms by fall 1942. By the end of the war, the RAF had fielded "Grand Slam" bombs as large as 10,000 kilograms. The detonation of these very large bombs caused seismic damage to buildings and buried water, sewer, and gas lines. The intent was, however, that the large high explosive bombs would blow doors and windows open so the draft would increase the effect of the incendiary bombs which were always dropped in large numbers. Incendiary bombs also became more sophisticated as the war progressed with later models containing rubber and liquid asphalt, making them stick to their targets and difficult to extinguish. During the war, the cities of Berlin and Munich both received over 2,000,000 incendiary bombs, while Frankfurt and Nuremberg both received over 1,000,000.

14. David Baker, Adolf Galland (1996), pages 243-246. American long-range escorts saved the daylight bomber offensive. In September 1943, fewer than 300 long range escorts were available, by mid-1944 this total had risen to over 1,000. As the American fighter strength increased, the Luftwaffe fighters had a more difficult time organizing for attacks on the bomber formations because American fighters would break up their concentrations. German twin- engine interceptors like the Me-110 and Me-410 were particularly vulnerable. American fighters were given wide latitude by their commander, Lt. General Jimmy Doolittle, who recognized that at least some of the fighters had to be free to roam in search of the German fighters rather than being tied to the bombers. The result was that the Luftwaffe was not able to attack as frequently or with as great a severity as had previously been possible. Allied losses to German fighters would decline until, by mid-1944, more aircraft were lost to German anti- aircraft fire than to German fighters.

15. William Hess, B-17 Flying Fortress (1974), pages 155-156. The Ploesti oil fields were Germany's most important producers of natural oil. They were overrun by Soviet forces in September 1944. Their loss crippled the Luftwaffe. Aircraft engines rely on high-octane fuel for maximum performance and Ploesti was a source of high-quality oil. Additionally, the Luftwaffe required large quantities of fuel to train replacement pilots. With the onset of shortages of fuel in 1944, the amount of training time provided to each Luftwaffe pilot was reduced, even as American and British pilots were increasing their training regime prior to entry into combat. By July 1944, German replacement pilots averaged just over 100 hours of flying experience while British and American pilots averaged closer to 350 hours of flying experience. During this same time period, German replacement pilots averaged less than 50 hours of experience flying fighter aircraft while American pilots averaged in excess of 150 hours of experience flying fighter aircraft. The American replacement pilots, on average, had more flight time in advanced fighter aircraft than the German replacement pilots had in all types of aircraft, including trainers.

16. Baker, D. Adolf Galland, pages 255-257. By August 1944, German fighter production had already risen dramatically. In June 1944, Germany produced 2,449 fighters, this rose to 2,954 in July, 3,020 in August, and peaked at 3,375 in September 1944. German bomber production fell from 767 in June 1944 to 326 in October 1944 and transport production was virtually eliminated by this time as well. By September 1944, 82 per cent of all German aircraft produced were fighters. Unfortunately for Galland, by the time the new fighters came available, there was a serious shortage of fuel and replacement pilots to operate them. Illustrating their severe lack of strategic intelligence, Allied estimates were that Germany was producing 1,000 to 1,500 fighters monthly during this time period.

17. Beck, E. Under the Bombs, page 155. Not only was Germany becoming crowded with refugees, but the German importation of foreign labor at a time when a significant portion of its manpower was committed to combat units at the front led to considerable uneasiness among the German civilian population. There was always concern that the foreign workers, some of whom were poorly treated, would cause disturbances or even uprisings.

18. Davis, R., Air War In Europe, pages 538-540. By January 1945, this diversion away from German industry had American strategic planners worried. The most conservative estimates held that the Luftwaffe would have 300-400 jets available for daily use by 1 July 1945. Because jet engines did not require high octane fuel, they were not threatened by the oil campaign. Rather, a campaign against jet assembly plants, jet engine plants, and airfields associated with jet training or jet deployment would be required.

19. Davis, R., Air War in Europe, pages 531-538. Many industries, such as jet aircraft production, had been widely dispersed in response to the increasing attacks by strategic bombers. Ironically, it was this dispersal which contributed significantly to the overall collapse of many sectors of German industry when the transportation system collapsed.

20. Davis, R., Air War in Europe, pages 543-558. Air War in Europe contains a detailed accounting of the decisions leading up to the bombing of Dresden and the aftermath of that bombing.

21. Beck, E., Under the Bombs, pages 193-194. Hamburg was the only city to surrender with the assistance of its Nazi leader. Kaufmann, however, had already earned a reputation as somewhat of a maverick among Nazi leaders for caring for his people and for appealing to Hitler to visit the city and view the effects of the July 1943 catastrophe.

22. Strategic Bombing Survey, page 107. The survey raised a number of additional points in its overall conclusion. These can be summarized as follows: 1) A first-class military power cannot live long under full-scale and free exploitation of air weapons over the heart of its territory. 2) The domination of the air was essential. 3) As the air offensive gained in tempo, the Germans were unable to prevent the decline and eventual collapse of their economy. 4) Attacks against basic industries were more effective than those against the armaments industry or in the city areas. 5) No indispensable industry was put out of commission by a single attack. Persistent reattack was necessary. 6) There was an important need for further and more accurate strategic intelligence about the German economy, especially before and during the early phases of the war. 7) Among the most significant other factors which contributed to the success of the air effort was the extraordinary progress during the war of Allied research, development, and production. 8) the success of the Allied air effort depended upon the courage, fortitude, and gallant action of the officers and men of the air crews and commands.

23. A total of 30 appendices which provide detailed statistics on the air campaign in Europe can be found in Carl A. Spaatz and the Air War in Europe (1993). Selected statistics include:

Battle casualties suffered by the American aerial forces in the European campaign totaled 94,565, of which 30,099 were killed, 13,360 were wounded, and 51,106 were missing. The worst year was 1944, when the American aerial forces suffered 61,426 casualties. Monthly crew losses between January 1944 and May 1945 ranged from a low of 465 to a high of 1,070.

Between May and November 1944, the total number of American bombardment groups peaked at 41, from April 1944 onwards a minimum of 30 fighter groups were available. The number of bombers available rose from 2,672 in January 1944 to 5,334 in January 1945 and peaked at 5,559 in April 1945. The number of fighters available rose from 4,111 in January 1944 to 5,614 in January 1945 and peaked at 6,003 in April 1945. Of the 22,948 American aircraft lost in combat during the war, 18,418 were lost in the campaign against Germany.

A total of 1,693,565 combat sorties were flown by the American forces in the campaign against Germany, during which a total of 1,554,463 tons of bombs were dropped.