The attack on Pearl Harbor ended the political division in the US between interventionists and isolationists. Now the US was united as never before.

The Japanese attack the US naval base at Pearl Harbor.

The Japanese give up on peace talks with America and began prepare for war.

The defining features of the nation of Panama are its abundant wildlife and that it is the place where the world's two largest oceans are at their closest.

The upper levels of Japanese government (and, more important, the military) increasingly came to the view that war with the United States was necessary if Japan was to survive.

At the end of the rasputitsa, the mud season, the German Army had one final, narrow opportunity, to win the war against the USSR before winter.

Even before the first German soldier crossed the frontier into the USSR, the Nazi government in Berlin had a plan for administering occupied Russia.

The German invasion of the USSR went brilliantly for the first 2-3 weeks, but instead of collapsing as expected, the Red Army only got stronger.

On June 22, 1941, Germany began an invasion of its erstwhile trade partner, the USSR. 

The Dust Bowl ravages the central United States, Charles Lindbergh's infant son is kidnapped, the America First movement opposes US involvement in the war.