The United States declines to give aid to Hungarian patriots in 1849 - Isolationism -

The motives behind the U. S. proposing the Open Door Policy in 1899 was that they saw that European powers were taking parts oF China and become more powerFul in the economic sense. The U. S. could not allow this, so they proposed the Open Door Policy to make economic stand o² Fair between the United States and the European powers.