is a political and economic system in which the government owns or controls the factors of production. The factors of production include natural resources, labor, machines and factories. Under this form of government, the government divides the wealth among all citizens

1919-1920 was a result of WWI and the rise of communism.

was a period of rivalry between the United States and the Soviet Union. It lasted from the end of WWII in 1945 until the Soviet Union collapsed in 1991

refers to the political, military, and cultural barrier that once divided much of the world. One side was the Soviet Union along with it's dependent states and allies and on the other were non-communist areas referred to as the West.

occurs when 2 or more nations compete to develop the newest and most sophisticated, and most lethal weapons.

is a nation that can wield strong influences over other nations and international affairs. Its power may be economic, military or both

Was coined by U.S. President Harry S. Truman in March 1947. It was a principle that stated the United States would provide money, supplies, military aid, and any other necessary support to counties threatened by the Soviet Union and communism.

is the money, good and resources given by one country to another. Such aid can take many forms including military expertise, scientific research, grants, loans medicine, food, infrastructure development, education and refugee relocation.

is a form of foreign policy where the goal is to contain a hostile power or to stop it from spreading its ideology

was the idea that a political event - specifically communism - in one country would cause neighboring countries to participate in the same event. This would happen just like dominoes in a line that fall and topple one another.

was an economic recovery program put into place by the United States to help European nations rebuild after World War II. By strengthening their postwar societies, the United States hoped to prevent the spread of communism.

Took place at the end of World War II between 1948 and 1949. It involved the Western Allies (United States, United Kingdom and France) smuggling goods into Soviet occupied Berlin by using heliocopters.

was an Eastern European defense alliance created in 1955. It included the Soviet Union, which would later become the Russian Federation, as well as Albania, Bulgaria, East Germany, Hungary, Poland, Romania and what was then Czechoslovakia.

refers to an arrangement among nations to prevent war through mutual protection. It acted as a deterrent to aggression by other nations

erected in 1961 by the Soviets to separate East and West Berlin - symbolized the tension of the Cold War

Nations were competing to put a man into space and, in doing so, proved their superior scientific and military capabilities.

On October 4, 1957, it was the world's first artificial satellite was launched by the Soviet Union

October 1962, the United States and the Soviet Union found themselves on the brink of war.

is an act of war. Ships, troops, or aircraft may be used to prevent people, supplies or other materials from leaving or entering a country