The Brezhnev Doctrine was a Soviet foreign policy that proclaimed that any threat to "socialist rule" in any state of the Soviet Bloc in Central and Eastern Europe was a threat to all of them, and therefore, it justified the intervention of fellow socialist states. It was proclaimed in order to justify the Soviet-led occupation of Czechoslovakia earlier in 1968, with the overthrow of the reformist government there. The references to "socialism" meant control by the communist parties which were loyal to the Kremlin. Soviet leader Mikhail Gorbachev repudiated the doctrine in the late 1980s, as the Kremlin accepted the peaceful overthrow of Soviet rule in all its satellite countries in Eastern Europe.
The Cold War (1948–1953) is the period within the Cold War from the incapacitation of the Allied Control Council in 1948 to the conclusion of the Korean War in 1953.
The Warsaw Pact (WP), formally the Treaty of Friendship, Cooperation and Mutual Assistance (TFCMA), was a collective defense treaty signed in Warsaw, Poland, between the Soviet Union and seven other Eastern Bloc socialist republics of Central and Eastern Europe in May 1955, during the Cold War. The term "Warsaw Pact" commonly refers to both the treaty itself and its resultant defensive alliance, the Warsaw Treaty Organization (WTO). The Warsaw Pact was the military and economic complement to the Council for Mutual Economic Assistance (Comecon), the regional economic organization for the Eastern Bloc states of Central and Eastern Europe.
The Eastern Bloc, also known as the Communist Bloc (Combloc), the Socialist Bloc, and the Soviet Bloc, was the coalition of communist states of Central and Eastern Europe, Asia, Africa, and Latin America that were aligned with the Soviet Union and existed during the Cold War (1947–1991). These states followed the ideology of Marxism–Leninism, in opposition to the capitalist Western Bloc. The Eastern Bloc was often called the "Second World", whereas the term "First World" referred to the Western Bloc and "Third World" referred to the non-aligned countries that were mainly in Africa, Asia, and Latin America but notably also included former pre-1948 Soviet ally Yugoslavia, which was located in Europe.
The term "Soviet empire" collectively refers to the world's territories that the Soviet Union dominated politically, economically, and militarily. This phenomenon, particularly in the context of the Cold War, is also called Soviet imperialism by Sovietologists to describe the extent of the Soviet Union's hegemony over the Second World.
Brinkmanship or brinksmanship is the practice of trying to achieve an advantageous outcome by pushing dangerous events to the brink of active conflict. The maneuver of pushing a situation with the opponent to the brink succeeds by forcing the opponent to back down and make concessions rather than risk engaging in a conflict that would no longer be beneficial to either side. That might be achieved through diplomatic maneuvers, by creating the impression that one is willing to use extreme methods rather than concede. The tactic occurs in international politics, foreign policy, labor relations, contemporary military strategy, terrorism, and high-stakes litigation.
The Cold War was a period of geopolitical tension between the United States and the Soviet Union and their respective allies, the Western Bloc and the Eastern Bloc, that started in 1947 and lasted to 1991.
The Cold War (1953–1962) discusses the period within the Cold War from the end of the Korean War in 1953 to the Cuban Missile Crisis in 1962. Following the death of Joseph Stalin earlier in 1953, new leaders attempted to "de-Stalinize" the Soviet Union causing unrest in the Eastern Bloc and members of the Warsaw Pact. In spite of this there was a calming of international tensions, the evidence of which can be seen in the signing of the Austrian State Treaty reuniting Austria, and the Geneva Accords ending fighting in Indochina. However, this period of good happenings was only partial with an expensive arms race continuing during the period and a less alarming, but very expensive space race occurring between the two superpowers as well. The addition of African countries to the stage of cold war, such as the Democratic Republic of the Congo joining the Soviets, caused even more unrest in the West.
The Agreement of Friendship, Cooperation, and Mutual Assistance of 1948, also known as the YYA Treaty from the Finnish Ystävyys-, yhteistyö- ja avunantosopimus, was the basis for Finno–Soviet relations from 1948 to 1992. It was the main instrument in implementing the Finnish policy called Paasikivi–Kekkonen doctrine.
The Western Bloc is an informal, collective term for countries that were officially allied with the United States during the Cold War of 1947–1991. While the NATO member states, in Western Europe and Northern America, were pivotal to the bloc, it included many other countries, in the broader Asia-Pacific region, the Middle East, Latin America, and Africa with histories of anti-Soviet, anti-communist and, in some cases anti-socialist, ideologies and policies. As such, the bloc was opposed to the political systems and foreign policies of communist countries, which were centered on the Soviet Union, other members of the Warsaw Pact, and usually the People's Republic of China. The name "Western Bloc" emerged in response to and as the antithesis of its communist counterpart, the Eastern Bloc. Throughout the Cold War, the governments and the Western media were more inclined to refer to themselves as the "Free World" or the "First World", whereas the Eastern Bloc was often referred to as the "Communist World" or less commonly the "Second World".
This is a timeline of the main events of the Cold War, a state of political and military tension after World War II between powers in the Western Bloc and powers in the Eastern Bloc.
The Cold War from 1979 to 1985 was a late phase of the Cold War marked by a sharp increase in hostility between the Soviet Union and the West. It arose from a strong denunciation of the Soviet invasion of Afghanistan in December 1979. With the election of Prime Minister Margaret Thatcher in 1979, and American President Ronald Reagan in 1980, a corresponding change in Western foreign policy approach toward the Soviet Union was marked by the rejection of détente in favor of the Reagan Doctrine policy of rollback, with the stated goal of dissolving Soviet influence in Soviet Bloc countries. During this time, the threat of nuclear war had reached new heights not seen since the Cuban Missile Crisis of 1962.
The time period of around 1985–1991 marked the final period of the Cold War. It was characterized by systemic reform within the Soviet Union, the easing of geopolitical tensions between the Soviet-led bloc and the United States-led bloc, the collapse of the Soviet Union's influence in Eastern Europe, and the dissolution of the Soviet Union in 1991.
A post-war or postwar period is the interval immediately following the end of a war. The term usually refers to a varying period of time after World War II, which ended in 1945. A post-war period can become an interwar period or interbellum, when a war between the same parties resumes at a later date. By contrast, a post-war period marks the cessation of armed conflict entirely.
The Cold War (1962–1979) refers to the phase within the Cold War that spanned the period between the aftermath of the Cuban Missile Crisis in late October 1962, through the détente period beginning in 1969, to the end of détente in the late 1970s.
During the Cold War, the Iron Curtain is a political metaphor used to describe the political boundary dividing Europe into two separate areas from the end of World War II in 1945 until the end of the Cold War in 1991. The term symbolizes the efforts by the Soviet Union (USSR) to block itself and its Satellite States from open contact with the West, its allies and neutral states. On the east side of the Iron Curtain were the countries that were connected to or influenced by the Soviet Union, while on the west side were the countries that were NATO members, or connected to or influenced by the United States; or nominally neutral. Separate international economic and military alliances were developed on each side of the Iron Curtain. It later became a term for the 7,000-kilometre-long (4,300 mi) physical barrier of fences, walls, minefields, and watchtowers that divided the "east" and "west". The Berlin Wall was also part of this physical barrier.
The post–Cold War era is a period of history that follows the end of the Cold War, which represents history after the dissolution of the Soviet Union in December 1991. This period saw many former Soviet republics become sovereign nations, as well as the introduction of market economies in eastern Europe. This period also marked the United States becoming the world's sole superpower.
The Warsaw Pact Early Warning Indicator Project was a highly classified US and Allied program designed to gather intelligence that would provide indicators of impending Soviet nuclear attacks before they occurred. It was the American analogue to Operation RYAN. The project aimed to observe and find ways to prevent conflicts with the Soviet Union and its allies from the Warsaw Pact. It consisted of intense clandestine reporting, and Indicator and Warning Methodology.
The United States foreign policy of the Dwight D. Eisenhower administration, from 1953 to 1961, focused on the Cold War with the Soviet Union and its satellites. The United States built up a stockpile of nuclear weapons and nuclear delivery systems to deter military threats and save money while cutting back on expensive Army combat units. A major uprising broke out in Hungary in 1956; the Eisenhower administration did not become directly involved, but condemned the military invasion by the Soviet Union. Eisenhower sought to reach a nuclear test ban treaty with the Soviet Union, but following the 1960 U-2 incident the Kremlin canceled a scheduled summit in Paris.
The Foreign policy of East Germany was characterized by the close ties of East Germany to the Eastern Bloc. During its existence, the most important partner was the Soviet Union (USSR), which acted as a protecting power and most important trade and economic partner, which is why the GDR was called a satellite state. The GDR remained closely linked to the other socialist states through organizations such as the Warsaw Pact and Camecon. While the GDR was relatively isolated outside the communist world in the first two decades of its existence due to the Hallstein Doctrine of West Germany, a change took place in the 1970s with the rapprochement with West Germany under Chancellor Willy Brandt's new Ostpolitik. As a result, the GDR was able to gain international status and establish diplomatic relations with almost 130 countries. While the Marxist-Leninist state ideology played a major role in the foreign policy of the East German government, it was however also influenced by their own economic and political interests. From the 1970s onwards, the GDR increasingly emancipated itself from the Soviet Union and pursued an independent policy towards West Germany, as loans from the West had become vital for the GDR's survival. In the 1980s, Erich Honecker refused to implement liberalizing reforms, which alienated the GDR from the USSR under Mikhail Gorbachev. After the revolutions of 1989, the Eastern Bloc collapsed and Germany was reunified, ending the period of an independent East German foreign policy.
Comecon – the Council for Mutual Economic Assistance was founded in accordance with Joseph Stalin's desire to enforce Soviet domination of the lesser states of Central Europe. Initially, the Comecon served as cover for the Soviet taking of materials and equipment from the rest of the Eastern Bloc. Its members were: 
Soviet Union 
People's Republic of Bulgaria 
Cuba 
Czechoslovak Republic (Czechoslovak Socialist Republic since 1960)
Hungarian People's Republic 
Laos 
Mongolian People's Republic 
North Korea 
Polish People's Republic 
People's Republic of Romania (after 1965, the Socialist Republic of Romania)
Vietnam 
People's Republic of Albania [lower-alpha 1] 
German Democratic Republic (withdrew in September 1990, before German reunification)
Byelorussian Soviet Socialist Republic (Byelorussia) and the 
Ukrainian Soviet Socialist Republic (Ukraine) were represented separately in the United Nations in addition to the Soviet Union. Though not parties to the Warsaw Pact, Vietnam, North Korea, Cuba, and Laos, maintained Cold War alliances with the Eastern Bloc.
NATO (North Atlantic Treaty Organization) – In the North Atlantic and Europe, NATO was formed in 1949, and its members during the Cold War were: 
Belgium 
Canada 
Denmark 
France 
Iceland 
Italy 
Luxembourg 
Netherlands 
Norway 
Portugal 
United Kingdom 
United States 
Greece - Joined 1952
Turkey - Joined 1952
West Germany - Joined 1955
Spain - Joined 1982
SEATO (Southeast Asia Treaty Organization) – formed in 1954 for the collective defense of Southeast Asia, though disbanded in 1977. Its members were: 
Australia 
New Zealand 
Pakistan - including modern Bangladesh 
Philippines 
Thailand 
Iran 
Iraq - Withdrew 1959
Argentina 
The Bahamas - Joined 1982
Bolivia 
Brazil 
Chile 
Colombia 
Costa Rica 
Dominican Republic 
Ecuador 
El Salvador 
Guatemala 
Haiti 
Honduras 
Mexico 
Nicaragua 
Panama 
Paraguay 
Peru 
Trinidad and Tobago 
Uruguay 
Venezuela 
