World War II included an invasion.
World War II . The Empire of Japan aimed to dominate Asia and the Pacific and was already at war with the Republic of China in 1937 , but the world war is generally said to have begun on 1 September 1939 with the invasion of Poland by Nazi Germany and subsequent declarations of war on Germany by France and the United Kingdom . On 22 June 1941 , the European Axis powers launched an invasion of the Soviet Union , opening the largest land theatre of war in history , which trapped the major part of the Axis ' military forces into a war of attrition .