WW2

World War II (1939-1945) was a global conflict primarily between the Axis Powers (Germany, Japan, Italy) and the Allies (mainly the US, UK, Soviet Union, and China). It began with Germany's invasion of Poland and expanded due to aggressive territorial expansion, leading to widespread battles across Europe, Asia, and the Pacific. The war involved significant destruction, the Holocaust, and innovations in warfare. It ended with the unconditional surrender of the Axis, leading to major geopolitical shifts, the formation of the United Nations, and eventual widespread efforts for peace and rebuilding.