In the first half of the 1800s, how did the arrival of large numbers of immigrants affect economic conditions in us cities? the number of available jobs rose. there were fewer jobs available. everyone's wages decreased. cities had more money to spend.

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.

answer; /// i believe the correct answer is (oasis)

use wikipedia, i think they have this.