What roles did the policy of containment play in the involvement of US in wars in korea and vietnam?

Question

What roles did the policy of containment play in the involvement of the united states in wars in korea and vietnam?

Answer 1

The Policy of containment in the Korean War cost 164 billion dollars, 140,000 soldiers died, and no one won; Vietnam was similar.

Answer 2

A containment policy was also applied by the U.S. to Iraq from 1991 to 2003.