You mean the Cold War? Containing communism wasn't a priomary goal of World War 2.
Native Americans believed that the land should be shared with everyone but Europeans were selfish and only thought of themselves
They always had small pox
Answer:
2) Refusing to join the League of Nations
Explanation:
The best action that demonstrated the United States' effort to isolate itself from European conflicts after World War I is "Refusing to join the League of Nations."
This is evident in the fact that the United States Congress failed to pass the bill to join the League of Nations. This is based on the idea or some Isolationists' fear that it might make the United States drawn into International issues unnecessarily.