The greek geographer, mathematician, astronomer, and poet who calculated the circumference of earth was a. eratosthenes b. archimedes c. pythagoras d. plato

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.