Introduction to World War II

​In the early 1940s, the United States faced a difficult decision when world war once again broke out. Americans were torn, with some feeling like the United States should fight against the Axis Powers and others wanting to avoid war at all costs.

World War II was fought between the Axis Powers (Germany, Italy, Japan) and the Allied Powers (Britain, United States, Soviet Union, France). Most of the countries in the world were involved in some way. It was the deadliest war in all of human history with around 70 million people killed.

​World War II

When was it?

World War II started in 1939 when Germany invaded Poland. Great Britain and France responded by declaring war on Germany. The war in Europe ended with Germany's surrender on May 7, 1945. The war in the Pacific ended when Japan surrendered on September 2, 1945.

​World War II

Where was it?

World War II started in Europe, but spread throughout the world. Much of the fighting took place in Europe and in Southeast Asia (Pacific).

​World War II

Poll

What do you think is a valid reason for the United States to take part in a war? Read the reasons below and then choose which options you think are valid.

• To defend U.S. territory and people

• To fulfill obligations to allies

• To gain territory or resources

• To stand up for an ideal