Which is an example of isolationism?

Britain agreed to Germany’s demands in the hopes of avoiding war.
Belgium fought against the German invasion of its borders.
Japan planned to gain power over other countries in its region.
The United States refused to enter into an international conflict.

representative government

i would go with the last one

answer: ensure protection from communism

explanation:

the north atlantic treaty was largely dormant until the korean war initiated the establishment of nato to implement it, by means of an integrated military structure: this included the formation of supreme headquarters allied powers europe in 1951, which adopted the western union's military structures and plans.