Ob i hope this is the right answer it seemed to be the one that mostly fit.
they decided to give them up because they realized that they weren't getting a lot of wars or raids and dont need them. the United states still has them because we are a big country with many threats and we have to be ready for anything.
sorry this is all i know ...
On March 5, 1946, Winston Churchill delivered his famous “Iron Curtain” speech, officially titled “Sinews of Peace,” at Westminster College in Fulton, Mo. After being introduced by President Harry Truman, Churchill, the former prime minister of Britain and now the opposition leader, warned of the threat posed by the Soviet Union, a World War II ally of Britain and the United States.
HOPE IT HELPS
Answer:
A. A reason to leave a place