How did the united states demonstrate its isolationist policy before world war ii?

The United States managed to maintain a state of political isolation throughout the 19th century and the first part of the 20th. Few nations have been able to maintain such a position for such a long period of time. Historians argue that it is largely due to geographical reasons, given the physical distance between Europe and the USA. UU

The beginning of the twentieth century brought with it problems that occurred in Europe and the Pacific, and this would end in large part with the isolationist feelings of the United States. The annexation of the Philippine Islands during the Hispano-American War of 1898 displaced US interests to the western Pacific Ocean, at the gates of Japan. USA UU he did not know how to perceive the threats against his position of neutrality. This caused the submarine war of Germany during the First World War, whose objective was to avoid the arrival of supplies towards the British Empire. When the war ended, EE. UU he forgot his new alliances; both the Treaty of Versailles and the League of Nations found little support from Congress.

The interwar period caused a resurgence of isolationism in the United States. After the war broke out in Europe, Americans like Charles Lindbergh, Gerald P. Nye and Rush D. Holt advocated American isolationism.

The effective attack of Japan on Pearl Harbor in 1941 broke any hope of EE. UU to maintain the isolationism, in fact this immediately made it to EE. UU In the Second World War. This time the alliances would not evaporate with the Allied victory: on the contrary, the Cold War would make them more desirable than ever.

As a summary, we can affirm that the USA remained totally isolated from the Second World War, did not participate in any attack, did not send weapons or personnel of the army, until the attacks of Japan, this fact was the trigger of the US income to war.