Title: Cold War in Asia
Content:  The Cold War in Asia was a major dimension of the world-wide Cold War that shaped largely diplomacy and warfare from the mid-1940s to 1991. The main players were the United States, the Soviet Union, China, Taiwan (Republic of China), North Korea, South Korea, North Vietnam, South Vietnam, Cambodia, Thailand, Indonesia, Malaysia, India, Pakistan and Afghanistan. Other countries were also involved, and less directly so was the Middle East. In the late 1950s China turned against the USSR and the two fought for control of Communist movements across the world, especially in Asia.
Title: Cold War
Content:  two superpowers, following their temporary alliance and victory against Nazi Germany in 1945. Aside from the nuclear arsenal development and conventional military deployment, the struggle for dominance was expressed via indirect means such as psychological warfare, propaganda campaigns, espionage, far-reaching embargoes, rivalry at sports events and technological competitions such as the Space Race. The Western Bloc was led by the United States as well as the other First World nations of the Western Bloc that were generally liberal democratic but tied to a network of the authoritarian states, most of which were their former colonies. The Eastern Bloc was led by the Soviet Union and its Communist Party, which had an influence across 
Title: Outline of the Cold War
Content:  Cold War participants &ndash; the Cold War primarily consisted of competition between the Eastern Bloc and the Western Bloc. While countries and organisations explicitly aligned to one or the other are listed below, this does not include those involved in specific Cold War events, such as North Korea, South Korea, and Vietnam. It also does not include countries such as China which, while not aligned to either blocs, still played an influential part in the Cold War.
Title: United States
Content:   After World War II, the United States and the Soviet Union competed for power, influence, and prestige during what became known as the Cold War, driven by an ideological divide between capitalism and communism. They dominated the military affairs of Europe, with the U.S. and its NATO allies on one side and the Soviet Union and its Warsaw Pact allies on the other. The U.S. developed a policy of containment towards the expansion of communist influence. While the U.S. and Soviet Union engaged in proxy wars and developed powerful nuclear arsenals, the two countries avoided direct military conflict. The United States often opposed Third World movements that it viewed as Soviet-sponsored and occasionally pursued direct action for regime change against left-wing governments, 
Title: Great power
Content:  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, which began following World War II. The term "cold" is used because there was no large-scale fighting directly between the two superpowers, but they each supported major regional conflicts known as proxy wars. The conflict was based around the ideological and geopolitical struggle for global influence by these two superpowers, following their temporary alliance and victory against Nazi Germany in 1945. During the Cold War, Japan, France, the United Kingdom and West Germany rebuilt their economies. France and the United Kingdom maintained technologically advanced 
Title: Cold War (1947–1953)
Content: 1947–49: Clement Attlee (UK); Harry Truman (US); Vincent Auriol (France); Joseph Stalin (USSR); Chiang Kai-shek (Allied China) ; 1950–51: Clement Attlee (UK); Harry Truman (US); Vincent Auriol (France); Joseph Stalin (USSR); Mao Zedong (China) ; 1952–53: Winston Churchill (UK); Harry Truman (US); Vincent Auriol (France); Joseph Stalin (USSR); Mao Zedong (China) During World War II, the Soviet Union annexed several countries as Soviet Socialist Republics within the Union of Soviet Socialist Republics. Most of those countries had been ceded to it by the secret agreement portion of the Molotov–Ribbentrop Pact with Nazi Germany. These later annexed territories include Eastern Poland (incorporated into two different SSRs), Latvia (became Latvian SSR), Estonia (became Estonian SSR),  Lithuania (became Lithuanian 
Title: Soviet Union
Content:  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, which began following World War II in 1945. The term cold war is used because there was no large-scale fighting directly between the two superpowers, but they each supported major regional conflicts known as proxy wars. The conflict was based around the ideological and geopolitical struggle for global influence by these two superpowers, following their temporary alliance and victory against Nazi Germany in 1945. Aside from the nuclear arsenal development and conventional military deployment, the struggle for dominance was expressed via indirect means such as psychological warfare, propaganda campaigns, espionage, far-reaching embargoes, rivalry at sports events and technological competitions such as the Space Race.
Title: Timeline of events in the Cold War
Content:  This is a timeline of the main events of the Cold War, a state of and military tension after World War II between powers in the Western Bloc (the United States, its NATO allies and others) and powers in the Eastern Bloc (the Soviet Union, its allies in the Warsaw Pact and later the People's Republic of China).
Title: Late modern period
Content:  The Cold War began in the mid-1940s and lasted into the early 1990s. Throughout this period, the conflict was expressed through military coalitions, espionage, weapons development, invasions, propaganda, and competitive technological development. The conflict included costly defense spending, a massive conventional and nuclear arms race, and numerous proxy wars; the two superpowers never fought one another directly. The Soviet Union created the Eastern Bloc of countries that it occupied, annexing some as Soviet Socialist Republics and maintaining others as satellite states that would later form the Warsaw Pact. The United States and various western European countries began a policy of "containment" of communism and forged myriad alliances to this end, including NATO. Several of these western countries 
Title: Cold War (1947–1953)
Content:  The United States joined Britain, France, Canada, Denmark, Portugal, Norway, Belgium, Iceland, Luxembourg, Italy, and the Netherlands in 1949 to form the North Atlantic Treaty Organization (NATO), the United States' first "entangling" European alliance in 170 years. West Germany, Spain, Greece, and Turkey would later join this alliance. The Eastern leaders retaliated against these steps by integrating the economies of their nations in Comecon, their version of the Marshall Plan; exploding the first Soviet atomic device in 1949; signing an alliance with People's Republic of China in February 1950; and forming the Warsaw Pact, Eastern Europe's counterpart to NATO, in 1955. The Soviet Union, Albania, Czechoslovakia, Hungary, East Germany, Bulgaria, Romania, and Poland founded this military alliance.

Question: who were the major countries involved in the cold war?
Answer: the Soviet Union.
the United States.