The major causes of World War II were numerous. They include the impact of the Treaty of Versailles following WWI, the worldwide economic depression, failure of appeasement, the rise of militarism in Germany and Japan, and the failure of the League of Nations. ... Then, on September 1, 1939, German troops invaded Poland.
World War II was one of the transformative events of the 20th century, causing the death of 3 percent of the world's population. Deaths in Europe totaled 39 million people — half of them civilians. Six years of ground battles and bombing resulted in widespread destruction of homes and physical capital.
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Explanation:
Roosevelt supervised the mobilization of the U.S. economy to support the war effort, and implemented a Europe first strategy, making the defeat of Germany a priority over that of Japan.
Slaves worked for free and had to do all hard labor that they were told to do.
The British Empire wasn't a consistent empire. Every colonie had their on viewpoint and methods for each empire. They did neglect some of there own and even america.