The document was drafted by Paul Nitze, who consulted State and Defense officials and was formally approved by President Truman as the official national strategy after the war began in Korea. It called for partial mobilization of the U.S. economy to build armaments faster than the Soviets. The plan called for strengthening Europe, weakening the Soviet Union, and building up the United States both militarily and economically.[225]

Truman and Shah of Iran Mohammad Reza Pahlavi speaking at Washington National Airport, during ceremonies welcoming him to the United States
Truman was a strong supporter of the North Atlantic Treaty Organization (NATO), which established a formal peacetime military alliance with Canada and democratic European nations of the Western Bloc following World War II. The treaty establishing it was widely popular and easily passed the Senate in 1949; Truman appointed General Eisenhower as commander. NATO's goals were to contain Soviet expansion in Europe and to send a clear message to communist leaders that the world's democracies were willing and able to build new security structures in support of democratic ideals. The United States, Britain, France, Italy, the Netherlands, Belgium, Luxembourg, Norway, Denmark, Portugal, Iceland, and Canada were the original treaty signatories. 