In an effort to protect themselves, all of the kingdoms of Sumer built outside their cities. A. large moats B. deep trenches C. massive walls D. watch towers

The truman doctrine was an american foreign policy whose stated purpose was to counter soviet geopolitical expansion during the cold war. it was announced to congress by president harry s. truman on march 12, 1947, and further developed on july 12, 1948, when he pledged to contain threats to greece and turkey