The justification that the u. s. used to become involved in haiti in 1915 was the roosevelt corollary to moral diplomacy dollar diplomacy the pendleton act the monroe doctrine

i think it's a)sparta

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.