AP US History
World War Two was a global conflict that lasted from 1939 to 1945, involving most of the world's nations divided into two opposing military alliances: the Allies and the Axis powers. This devastating war resulted in significant changes to global politics, economics, and society, including the establishment of the United Nations and the beginning of the Cold War. The war was marked by major events such as the Holocaust, significant battles, and the use of atomic bombs.