During World War I, Japan had been an ally of Britain, France, Italy, Russia and the U.S. After WWI, America decided to gain territories in the Pacific, and it formed the Pacific Defense Triangle. Japan also wanted to expand and it began a rivalry with the U.S. over the Pacific.
At the same time, Japan began expanding into Asia, particularly into China—a now weak country due to their revolutions and civil wars. In 1931 the Mukden Incident occurred and started sporadic warfare between Japan and China, which lasted until 1937. That same year (1937) the Marco Polo bridge incident came about. This officially started World War II in the East. From then until 1945 there was continuous warfare between China and Japan.
Adolph Hitler and his Nazis were another key factor in bringing forth World War II. Hitler was born in Austria-Hungary. His parents both died while he was still young. He made his living off of an inheritance and also painting post cards. Throughout his adolescence Hitler was involved in anti-Semitic movements. This is key because when he came into power Hitler was set upon practically wiping out the Jewish population in Germany and elsewhere. Hitler also fought in WWI and became a corporal.
After the war he was assigned to infiltrate a group called the DAP. Continue reading