Question

why was the united nations formed? to promote communism to engage in armed conflict to defend nations against attack to promote international peace

Explanation:

The United Nations was established to maintain international peace and security, develop friendly relations among nations, and achieve international cooperation in solving economic, social, cultural, and humanitarian problems. It was not formed to promote Communism, engage in armed conflict, or only defend against attack in a narrow - sense. Its overarching goal is peace.

Answer:

to promote international peace