FC: The United States in the World
1: Isolationism The policy of avoiding foreign affairs. The U.S. chose to remain out of the war due to the fact that they had to real stake in it, nor was the country in any shape to fight.
2: Neutrality The policy of not choosing sides in a war. This caused tension between trading countries.
3: Sinking of the Lusitania This heightened the tension between Germany and the U.S., and caused the United States to enter the war.
4: Zimmerman Note A telegram from the German Ambassador to Mexico asking them to fight the Americans. This caused America to declare war on Germany.
5: Selective Service Act of 1917 A law that required young men between the ages of 21 to 30 to register for military service. Thus men were being forced to fight in the military.