The main opponents in World War II was Germany, Japan, and Italy.
It started when Germany invaded Poland on September 1, 1939. That's when Great Britain and France <span>declared war on Germany on September 3.
America didn't enter WW2 until </span>Japanese bombed the American fleet in Pearl Harbor, Hawaii, on December 7, 1941.
Extra facts:
"WW2 was the most armed conflict in history. Over six continents and all the world's oceans, the war caused an estimated 50 million military and civilian deaths, including those of 6 million Jews."- https://www2.gwu.edu/~erpapers/teachinger/glossary/world-war-2.cfm
<span>The Axis Powers (Germany, Italy, Japan) fought the Allies<span> (France, Great Britain, the United States, the Soviet Union, China). </span></span>
