On September 1st 1939, Germany launched an attack on Poland. They launched an new attack " Bltzkrieg" This destroyed the Polish Air Force.
However Poland had allies, Great Britain and France. They tried to help Poland, but didn't succeed. Germany then started to plan for invasions in the enemy countries.
On May 10th, 1940. Germany attacked France. Germany occupied much of France, but let some Frencg leaders those that cooperated with Hitler lead.
October 1940, Germany attacked Britain. Hitlers plan was to destroy the British Air Force. Bombing continued until 1941. Hitler however didn't succeed in taking control of Great Britain.
Instead the German failure in Great Britain, lead hitler too look the Soviet Union. The Soviet Union began to fight back.
Meanwhile Japan wanted to move its forces to Southeast Asia, where the region was rich in oil. In response, the Americans banned the sail of oil in attempt to slow the Japanese war machines. On Decemebr 8th, the U.S declared war on Japan. 3 days later Germany declared war on the U.S Adof Hitler died committing suicide .