The dawes severalty act of 1887 failed because

The 1887 Dawes Act imposed a new system of land managing in which the traditonal tribal ownership of land could no longer be used. Momaday accused it of being uprooting for Native Americans and to destroy their traditions.

Explanation:

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.

nations must cooperate to bring about and maintain world peace.

nations must not wage wars or commit war crimes in a desire to control other nations.

i think i know which options you have but if these aren't options let me know