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The first world war started in 1914, but America didn't join until April 6, 1917. President Woodrow Wilson wanted America to stay neutral with this war, but German U-boats sunk the Lusitania killing many Americans. This changed Americans' opinions, thus causing them to join the fighting in 1917. World War I would end a year later, in 1918. -
On August 18, 1920, the nineteenth amendment was ratified. This amendment is crucial because it allowed for women to vote. -
The Great Depression began in August 1929 and lasted until March 1933. This was a terrible economic decline caused by the stock market crash of 1929. From here, banks closed, and many people lost their jobs. -
The New Deal was a set of programs created because of the great depression to provide economic relief by President Roosevelt. It lasted until around 1939, though many programs were widely accepted and became a permanent part of national life. -
The U.S. officially joined the second world war on December 11, 1941. America joined this war because Japan bombed Pearl Harbor on December 7, 1941. The war itself started in 1939 and ended in 1945. -
After World War II, the Cold War took place with rising tension between the U.S. and the Soviet Union. This war was fought on economic, propaganda, and political fronts lasting until 1991. -
America fought in the Vietnam War to contain communism but suffered significant casualties. In the end, the U.S. pulled out of Vietnam in 1973, though the war didn't end until 1975. -
This was a movement lasting until 1968 to end racial segregation and discrimination. Many significant events happened during this time, such as Brown vs. Board of Education, the Montgomery Bus Boycott, and Freedom Rides. -
On July 20, 1969, U.S. astronauts Neil Armstrong and Buzz Aldrin landed on the moon and were the first to ever walk on it. -
On September 11, 2001, a series of airplane hijackings later resulted in the bombing of the twin towers, the pentagon, and somewhere in Pennsylvania.