Europe
The battles of the WW2 were fought across the globe from the fields of Western Europe and the Russian plains to the China and the waters of the Pacific. These battles caused many deaths, and destructions of houses in 1939. About 22 to 26 million men were killed in these battles.
Asia
Japanese expansion in East Asia began in 1931 with the invasion of Manchuria and continued in 1937 with a brutal attack on China. In December 1941, Guam and Wake Island fell to the Japanese, followed in the first half of 1942 by the Philippines, the Dutch East Indies, Hong Kong, Malaya, Singapore, and Burma.