Czechoslovak Socialist Republic in the context of "Polish People's Republic"

The revolutions of 1989, also known as the fall of communism, were a wave of liberal democratic movements that resulted in the collapse of most Marxist–Leninist governments in the Eastern Bloc and other parts of the world. This wave is sometimes referred to as the "autumn of nations", in reference to the revolutions of 1848 as the "spring of nations". The revolutions of 1989 were a key factor in the dissolution of the Soviet Union—one of the two superpowers—and abandonment of communist regimes in many parts of the world, some of which were violently overthrown. These events drastically altered the world's balance of power, marking the end of the Cold War and beginning of the post-Cold War era.

The earliest recorded protests, which led to the revolutions, began in Poland on 14 August 1980, the massive general strike which led to the August Agreements and establishment of Solidarity, the first and only independent trade union in the Eastern Bloc, whose peak membership reached 10 million. The main region of the 1989 revolutions was Central Europe, starting in Poland with the 1988 Polish strikes, and continued in Hungary, East Germany, Bulgaria, Czechoslovakia, and Romania. On 4 June 1989, Poland conducted the first elections that led to the dissolution of the communist government, with Solidarity winning an overwhelming victory, leading to the peaceful fall of communism in Poland. Influenced by Poland, Hungary organised round table-format talks and began dismantling its section of the Iron Curtain. In August 1989, over a quarter of the Baltic states population physically chained for 675 kilometres (419 mi) in the Baltic Way protesting the occupation by the Soviet Union, while the opening of a border gate between Austria and Hungary set in motion a peaceful chain reaction, in which the Eastern Bloc disintegrated. This led to mass demonstrations in cities of East Germany and the fall of the Berlin Wall in November 1989, which served as the symbolic gateway to German reunification in 1990. A feature common to these developments was the extensive use of campaigns of civil resistance, demonstrating popular opposition to the continuation of one-party rule and contributing to pressure for change. Romania was the only country in which citizens and opposition forces used violence to overthrow its communist regime, although Romania was politically isolated from the rest of the Eastern Bloc.

The Eastern Bloc, also known as the Communist Bloc (Combloc), the Socialist Bloc, the Workers Bloc, and the Soviet Bloc, was an unofficial 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 and various types of socialism, 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.

In Western Europe, the term Eastern Bloc generally referred to the USSR and Central and Eastern European countries in the Comecon (East Germany, Poland, Czechoslovakia, Hungary, Romania, Bulgaria, and Albania). In Asia, the Eastern Bloc comprised Mongolia, Vietnam, Laos, Kampuchea, North Korea, South Yemen and China. In the Americas, the countries aligned with the Soviet Union included Cuba from 1961 and for limited periods Nicaragua and Grenada.

In late February 1948, the Communist Party of Czechoslovakia (KSČ), with Soviet backing, assumed undisputed control over the government of Czechoslovakia through a coup d'état. It marked the beginning of four decades of the party's rule in the country.

The KSČ enjoyed a period of popularity following the reestablishment of pre-war Czechoslovakia. After a successful performance during the 1946 parliamentary election, party leader Klement Gottwald became prime minister of a coalition government at the behest of President Edvard Beneš. By summer 1947, however, the KSČ's popularity had significantly dwindled, and the party was expected to be soundly defeated in the May 1948 elections. This, along with the electoral failures of the French and Italian communist parties, prompted Joseph Stalin to harden his approach and order Gottwald to seize power.

The Hungarian People's Republic (HPR) was a landlocked country in Central Europe from its formation on 20 August 1949 until the establishment of the current Republic of Hungary on 23 October 1989. It was a professed communist state, governed first by the Hungarian Working People's Party and after the Hungarian Revolution of 1956, the Hungarian Socialist Workers' Party. Both governments were closely tied to the Soviet Union as part of the Eastern Bloc.

The state considered itself the heir to the Hungarian Soviet Republic, which was formed in 1919 as one of the first communist states created after the Russian Soviet Federative Socialist Republic (Russian SFSR). It was designated a "people's democratic republic" by the Soviet Union in the 1940s. Geographically, it bordered Romania and the Soviet Union (via the Ukrainian SSR) to the east; Yugoslavia (via SRs Croatia, Serbia, and Slovenia) to the southwest; Czechoslovakia to the north and Austria to the west.

State atheism is the incorporation of hard atheism or non-theism into political regimes. It is considered the opposite of theocracy and may also refer to large-scale secularization attempts by governments. To some extent, it is a religion-state relationship that is usually ideologically linked to irreligion and the promotion of irreligion or atheism. State atheism may refer to a government's promotion of anti-clericalism, which opposes religious institutional power and influence in all aspects of public and political life, including the involvement of religion in the everyday life of the citizen. In some instances, religious symbols and public practices that were once held by religions were replaced with secularized versions of them. State atheism in these cases is considered as not being politically neutral toward religion, and therefore it is often considered non-secular.

The majority of communist states followed similar policies from 1917 onwards. The Soviet Union (1922–1991) had a long history of state atheism, whereby those who were seeking social success generally had to profess atheism and stay away from places of worship; this trend became especially militant during the middle of the Stalinist era, which lasted from 1929 to 1953. In Eastern Europe, countries like Bulgaria, East Germany and Czechoslovakia experienced strong state atheism policies. The Soviet Union attempted to suppress public religious expression over wide areas of its influence, including places such as Central Asia. Currently, China, North Korea, and Vietnam, are officially atheist.

On 20–21 August 1968, the Czechoslovak Socialist Republic was jointly invaded by four Warsaw Pact countries: the Soviet Union, the Polish People's Republic, the People's Republic of Bulgaria, and the Hungarian People's Republic. The invasion stopped Alexander Dubček's Prague Spring liberalisation reforms and strengthened the authoritarian wing of the Communist Party of Czechoslovakia (KSČ).

About 250,000 Warsaw Pact troops (rising afterwards to about 500,000), supported by thousands of tanks and hundreds of aircraft, participated in the overnight operation, which was code-named Operation Danube. The Socialist Republic of Romania and the People's Republic of Albania refused to participate. East German forces, except for a small number of specialists, were ordered by Moscow not to cross the Czechoslovak border just hours before the invasion, because of fears of greater resistance if German troops were involved, due to public perception of the previous German occupation three decades earlier. 137 Czechoslovaks were killed and 500 seriously wounded during the occupation.

The de-satellization of the Socialist Republic of Romania from the Soviet Union was the release of Romania from its Soviet satellite status in the 1960s. The Romanian leadership achieved the de-satellization partly by taking advantage of Nikita Khrushchev's errors and vulnerabilities. Romania's independence was tolerated by Moscow because its ruling party was not going to abandon communism. Although Romania remained a member of both the Warsaw Pact and Comecon, it was not to be a docile member of either.

Even before Nicolae Ceaușescu came to power, Romania was a genuinely independent country, as opposed to the rest of the Warsaw Pact. To some extent, it was even more independent than Cuba (a socialist state that was not a member of the Warsaw Pact). The Romanian regime was largely impervious to Soviet political influence, and Ceaușescu was the only declared opponent of glasnost and perestroika. Due to the conflictual relationship between Bucharest and Moscow, the West did not hold the Soviet Union responsible for the policies pursued by Romania, as it did for other countries in the region such as Czechoslovakia and Poland. At the start of 1990, Soviet foreign minister Eduard Shevardnadze implicitly confirmed the lack of Soviet influence over Ceaușescu's Romania. When asked whether it made sense for him to visit Romania less than two weeks after its revolution, Shevardnadze insisted that only by going in person to Romania could he figure out how to "restore Soviet influence".