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American Involvement in WWII: Causes and Effects

Explore the factors leading to American entry into WWII, including the Pearl Harbor attack, Axis and Allies advantages, and the mobilization of the United States for war. Discover how cooperation and increased production played a crucial role in shaping the outcome of the war.

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American Involvement in WWII: Causes and Effects

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  1. Do Now! • Create a web brainstorming everything you know about American involvement in WWII.

  2. Americans in WWIIChapter 24 Section 1

  3. After the attack on Pearl Harbor many Americans rush to join WWII • Roosevelt declares war December 11th 1941 • 2,350 dead, 68 civilians (1,177 from USS Arizona) • This attack was shocking to Americans. Why? • Why do you think the Japanese decided to attack first?

  4. Axis Advantages • Both Germany and Japan maintained firm control of conquered areas • Why would this be an advantage? • Germany and Japan were better prepared for war • Increased militarism/aggression during the 1930s • People were angry, they knew war was coming

  5. Allies Advantages • Germany had to spread its forces from France to the Soviet Unionand from Norway to North Africa • Japan controlled a large area in the Pacific • 2 front war—Germany never defeated the British or the Soviets • How could this potentially cause major problems for the Third Reich? • Gigantic Soviet military and U.S. production power were keys to victory

  6. The United States Mobilizes for War • Wartime economy • Government and private industries cooperate for war effort • Union leaders agree not to strike • Why is cooperation among these entities so important?

  7. Increased Production • Government employs 500,000 workers to produce ammunition and weapons • No cars are produced between 1940 and 1945 • American car factories produce planes, tanks, jeeps, and guns • This creates an economic boom that ends the Great Depression • Unemployment drops to 1.2% in 1944 • Average earnings almost double

  8. Government Expansion • Mobilizing for war required a much larger federal government—why? • Total war—there is not difference between civilian and military resources • War Production Board—directed conversion of civilian factories to military ones • Office of War Mobilization—coordinated government agencies involved in war effort • Selective Training and Service Act (1940)—peacetime draft

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