Churchill's Iron Curtain speech was mainly based off of how East and West Germany was split up. He said there was basically an imaginary curtain that basically divided Europe in two.
Warsaw Pact Formed
The Truman Doctrine was a document made by President Harry Truman, which calls for U.S. financial and military aid to Greece and Turkey in an effort to protect the countries from Soviet domination. His initial request was specifically for $400 million to assist both Greece and Turkey, which Congress approved. The Truman Doctrine was followed by the Marshall Plan later that year.
The Arms Race
NATO stands for North Atlantic Treaty Organization, which was also called The North Atlantic Alliance, is an intergovernmental military alliance between several North American and European states. The prospect of further Communist expansion prompted the United States and 11 other Western nations to form NATO.
The formation of the Warsaw Pact was in some ways a response to the creation of NATO, and it was more directly inspired by the rearming of West Germany and its admission into NATO in 1955. In the aftermath of World War I and World War II, Soviet leaders felt very apprehensive about Germany once again becoming a military power–a concern that was shared by many European nations on both sides of the Cold War divide.
The arms race was a competition for supremacy in nuclear warfare between the United States, the Soviet Union, and their respective allies during the Cold War. The US government decided to develop a hydrogen bomb, first tested in 1952. This lead many Americans to fear a Nuclear War, urging them to prepare for an atomic bomb. The NSC-68 which was released in 1950 as a secret policy paper and called for quadrupling defense spendings in order to meet the perceived Soviet threat.
The Space race was a major competition between the US and the USSR to develop aerospace capabilities, satellites, space probes and eventually human spaceflight. NASA was created in 1958 with the main responsibility for the research. Early Soviet success with the Sputnik 1 had a major impact on the US, altering strategic defense doctrines. With Sputnik 2 launched in November of 1957 carrying Laika the dog and Sputnik 3 in May of 1958, they finally launched the Lunik 3 in 1959 to photograph the dark side of the moon.