To make the policy of containment effective, the united states initiated a program of involving the formation of mutual defense alliances with other nations.

Collective Security

Explanation:

Collective Security is a crisis management tool that supposes an agreement by  all countries to jointly fulfill an offense that any state can commit against each other.

Conflict or an attack is seen as an infringement of international security and peace,  and all countries stand for joint action in defense of harmony.

answer; i believe the correct answer is (8) eight.