The second World War was much more provoked than its predecessor. Europe, having seen the extreme death and destruction brought on by modern warfare, was, for the most part, reluctant to do battle again. However, Italy and Germany were unhappy with how World War I had been settled, and new leaders rose to power there to avenge the wrongs they felt had been done to their countries. This revenge presented itself in the form of aggression and expansionist ambitions; Italy, under Mussolini, bombed Ethiopia; Germany, under Hitler, invaded the Sudetenland in Czechoslovakia; and Japan, which was in effect a military dictatorship, invaded Manchuria in Northern China. The League of Nations, which had been established to maintain world peace after WWI, had no power to put a stop to their actions, and atrocities continued to be committed by the aggressors until it became clear that they would not stop without direct military interference. The Allies (Great Britain, France, the USA, and, eventually, Russia) went up against Germany, Italy, and Japan once again, and eventually triumphed. Germany was divided into districts of occupation by various Allies, and the process of rebuilding began.