I believe that this is an opinion question that only you can answer
The action during the 1930s heightened the tensions between Japan and the United states is the Japan invaded Chinese Territory.
Between 1937 and 1941,escalating conflict between China and Japan influenced U.S relations with both nations, and ultimately contributed to pushing the United states toward Full-scale war with Japan and Germany.
The Germans attacked France in their blitzkrieg attack.
Answer - Three factors fueled American Imperialism.
Economic competition among industrial nations.
Political and military competition, including the creation of a strong naval force.
A belief in the racial and cultural superiority of people of Anglo-Saxon descent.
Austria-Hungary
Ottoman Empire - Turkey
Germany