When West Germany joined NATO in 1955 Soviet fears of a recovered Germany was revived. With Germany as part of a military alliance again, the Soviets and East Europeans signed the Warsaw Pact to form a defensive alliance controlled by the Soviet Union. It was signed by Albania, Bulgaria, Czechoslovakia, East Germany, Hungary, Poland, Romania, and USSR.The Truman Doctrine and the Marshall plan were clean signs that America had no intention of returning a military alliance in the west. In 1949 the North Atlantic Treaty Organization was formed. All members agreed to go to war if any one of them was attacked. Signed by Belgium, Britain, Canada, Denmark, France, Iceland, Italy, Luxembourg, Netherlands, Norway, Portugal, and the USA. Stalin responded to the Truman Doctrine by strengthening his hold on Eastern Europe and driving non-communists from office.