Between 1919 and 1946 the United States of America had 2 very different foreign policy’s. First there was the concept of Isolationism and later the idea of Containment of Communism. Isolationism was developed after the First World War and focused on the homeland United States and the issues there. Containment was developed after the Second World War and into the Cold War and focused on containing Communism in the Soviet Union. The U.S. Foreign Policy between 1919-1941 was based on the idea of Isolationism and neutrality but after World War II, the U.S. abandoned this and became heavily involved in world affairs.
Soon after WWI the USA changed there Foreign Policy to an idea of Isolationism. In 1920, a few years after World War I, the United States Congress rejects the Treaty of Versailles, including the League of Nations in the treaty. The U.S. Congress rejected the treaty because they felt it disempowered the United States and that the treaty was very harsh on Germany. Also, Americans did not want to focus on foreign affairs, but to focus on the problems in homeland USA. A few problems in the USA during this time consisted of, the 1929 Stock Market Crash that plummeted the United States into a decade and a half long depression known as the Great Depression. The Red Scare was another problem in the USA, the citizens fearing that the Communistic government was coming to America. In the beginning stages of WW2 the United States was not involved and did not want to be involved with the war overseas. Keeping to this idea the USA passed the Neutrality Act of 1935 on August 31, 1935. This act stated that the USA would not trade arms with either side of the war and that US citizens traveling on warring ships would be traveling at their own risks. This was done to prevent the U.S. from being thought as being in an alliance.
The post WWII approach to a Foreign Policy was very different than the post WWI approach. The post WWII approach