what was the policy that kept the us out of the war for three years
The Neutrality Laws. Informally a policy of isolationism kept us out of the war until the USA was attacked.
Neutrality
neutrality
US domestic policy in the 1920s was focused on returning to normalcy in the aftermath of WWI. To achieve this goal, laws like prohibition and limiting immigration were implemented. For more on US 1920s domestic policy, check out the related link below.
Neutrility
Yes, President Wilson's aim was to keep the US out of WWI. Of his policy he stated, "the true spirit of neutrality, which is the spirit of impartiality and fairness and friendliness to all concerned."
The US could no longer remain neutral in WWI because of Germany's policy of unrestricted submarine warfare and the Zimmerman note. Also, the United States had economic and cultural ties to the allies.
The US has never had a policy of imperialism. We have not conquered and set up colonies like the French, Belgians, British, or Spanish had. The unwritten policy of isolationism ended with WWI, and and the leadership and power of the US filled the void of power after the war. There has been no turning back, because to do so would create another void of leadership.
This is true. President Wilson's aim was to keep the US out of WWI. Of his policy he stated, "the true spirit of neutrality, which is the spirit of impartiality and fairness and friendliness to all concerned."
no answer
In both WWI and WWII.