World War II was ignited by Germany's invasion of Poland in 1939. The allies were pitted against the Axis as each struggled to push their ideological thoughts with the overarching goal being the acquisition of dominance in two theatres across the planet. German nationalism had peaked after the distressing punishment it received in its Armistice Day surrender, and was only equated by that of the Japanese in the Pacific. The German Chancellor Adolf Hitler promised to give Germany the breathing room and power it deserved.
Later atrocities would be committed during the war, such as internment camps on both sides of the conflict, the Nazi led Holocaust: a genocide of European Jewish and Gypsy populations, as well as those that were in some form disabled, the Rape of Nanjing, the dropping of two atom bombs, and the deaths of upwards of seventy million people.