What is the most important about world. war 2

World War II was a global war that lasted from 1939 to 1945 ... nor Britain (the two other nations most devastated by the Great War) were eager for confrontation.

The legacy of the war would include the spread of communism from the Soviet Union into eastern Europe as well as its eventual triumph in China, and the global shift in power from Europe to two rival superpowers-the United States and the Soviet Union-that would soon face off against each other in the Cold War.