The American Revolutionary War, the Declaration of Independence, and the birth of the two-party system — this is a pivotal period in American history.
During WWll, with white men fighting overseas, African Americans were able to get better job opportunities, and a new law passed saying that blacks and whites had to be in integrated units in the army. But, when the war ended and black soldiers returned to America they weren't greeted with a hero's welcome and instead were treated like all other blacks- they were forced to be segregated. This change from almost equality to none at all really fired up the Civil Rights Movement in the 1950's and 1960's.
In the 1930's Japan went to war with China. The United States supported China and placed a trade embargo on Japan so they couldn't get any supplies from the United States, particularly oil that might fuel Japan's military conquests.<span />
