What are the reasons of the world war 2

Some of the causes  of World War II were Italian fascism in the 1920s, Japanese militarism and invasions of China in the 1930s, and especially the political takeover in 1933 of Germany by Hitler and his Nazi Party and its aggressive foreign policy.

Why world war 2 happened is because of the anger felt in Weimar Germany that was caused by the treaty of versailles and also another cause was the obvious inability of the league of the nations to deal with major international issues

In the late 1800s, political machines remained in power mostly by trading money and favors for votes. As more and more immigrants entered Americans cities, the political machines began to provide them with food, clothing, and shelter in exchange for loyal devotion at the ballot box. These immigrants rarely spoke English fluently and struggled to survive, therefore many readily took up the offers of these urban political machines.