b. Briefly explain ONE policy or action that promoted peaceful coexistence.

Creation of the United Nations (1945) :  Established to promote international co-operation. A replacement for the ineffective League of Nations, the organization was created following the Second World War to prevent another such conflict. Similar to the League of Nations, the United Nations consisted of over 50 nations with the goal maintaining international peace and security

North Atlantic Treaty Organization (NATO) - 1949

Fearful that western European nations could not resist a Soviet attack from eastern Europe, President Truman signed a treaty that created a military alliance (a pact between states in a common cause) known as the North Atlantic Treaty Organization (NATO).  NATO linked the United States and western Europe in such a way that, as Truman said, “an armed attack against one or more of the [nations] in Europe or North America shall be considered an attack against them all.”  Members of NATO in 1949 were Canada, the United States, Great Britain, France, Iceland, Portugal, Belgium, the Netherlands, Luxembourg, Denmark, Norway, Switzerland, and Italy.  Greece and Turkey joined the alliance in 1952, and East Germany was admitted in 1954

détente (beginning in 1967)

SALT I (1972)

SALT II (1979) 

the Geneva Accords (1954)

the Paris Peace talks (1973