When did the US enter World War II?

Even before Roosevelt's second term really got off to a good start, his domestic political agenda was overshadowed by new dangers that most Americans hardly noticed: the expansionist ambitions of totalitarian regimes in Japan, Italy and Germany. When Germany, Italy and Japan maintained their aggression, the United States declared that no country in the conflict would receive aid from them. Neutrality laws of 1935-1937 prohibited trade in or credit for warring nations. When the Second World War broke out in Europe in 1939, the United States initially relied on neutrality.

After the fall of France and the start of the air war against Britain in 1940, the debate intensified between those who wanted help to the democracies and the isolationists. Ultimately, the advocates of an intervention won. The United States and Canada formed a Mutual Board of Defense and, along with Latin American countries, offered joint protection to the nations in the Western Hemisphere. Congress approved huge sums for rearmament and, in early 1941, the Lend-Lease Program, through which President Roosevelt could deliver weapons and equipment to any nation (especially Great Britain, the Soviet Union, and China) considered important to the defense of the United States were. In the 1940 presidential election, Roosevelt again won a majority and, for the first time in United States history, a president was elected for a third term.

On December 7th, the Japanese bombed the US Pacific Fleet in Pearl Harbor, Hawaii. On December 8th, Congress declared war on Japan. Three days later, Germany and Italy, as Japan's allies, declared war on the United States. The nation quickly mobilized its people and industry as a whole. All areas - agriculture, manufacturing, mining, trade, labor, investment, communication, even education and culture - have been brought under new and stronger control in one way or another. At the end of 1943 around 65 million men and women were wearing uniforms or were working in war-related occupations.

The western allies agreed to focus their military efforts on Europe, where the center of enemy power was, while the war in the Pacific was seen as less important. Allied troops landed in Normandy on June 6, 1944, the so-called D-Day. Paris was liberated on August 25th. In February and March 1945 the troops advanced into Germany. Germany surrendered on May 7th. The war in the Pacific continued even after Germany surrendered. The atomic bomb was dropped on Hiroshima on August 6th and Nagasaki on August 8th. On August 14, Japan agreed to the terms set in Potsdam on July 26, and Japan surrendered on September 2, 1945.

See also:
About the USA> German-American Relations