Warsaw Pact invasion of Czechoslovakia in the context of "Hungarian People's Republic"

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 in 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 military alliance, the Warsaw Pact Organisation (WPO) (also known as ‘Warsaw Treaty Organization’ (‘WTO’)). The Warsaw Pact was the military complement to the Council for Mutual Economic Assistance (Comecon), the economic organization for the Eastern Bloc states.

Dominated by the Soviet Union, the Warsaw Pact was established as a balance of power or counterweight to the North Atlantic Treaty Organization (NATO) and the Western Bloc. There was no direct military confrontation between the two organizations; instead, the conflict was fought on an ideological basis and through proxy wars. Both NATO and the Warsaw Pact led to the expansion of military forces and their integration into the respective blocs. The Warsaw Pact's largest military engagement was the Warsaw Pact invasion of Czechoslovakia, one of its own member states, in August 1968. All member states participated except for Albania and Romania, resulting in Albania's withdrawal from the pact less than one month later. The pact began to unravel with the spread of the Revolutions of 1989 through the Eastern Bloc, beginning with the Solidarity movement in Poland, its electoral success in June 1989 and the Pan-European Picnic in August 1989.

Czechoslovakia (/ˌtʃɛkoʊsloʊˈvæki.ə, ˈtʃɛkə-, -slə-, -ˈvɑː-/ CHEK-oh-sloh-VAK-ee-ə, CHEK-ə-, -⁠slə-, -⁠VAH-; Czech and Slovak: Československo, Česko-Slovensko) was a landlocked country in Central Europe created in 1918 when it declared its independence from Austria-Hungary. In 1938, after the Munich Agreement, the Sudetenland became part of Nazi Germany. Between 1939 and 1945, the state ceased to exist, as Slovakia proclaimed its independence and Carpathian Ruthenia became part of Hungary, while the German Protectorate of Bohemia and Moravia was proclaimed in the remainder of the Czech Lands. In 1939, after the outbreak of World War II, former Czechoslovak president Edvard Beneš formed a government-in-exile and sought recognition from the Allies.

After World War II, Czechoslovakia was re-established under its pre-1938 borders, with the exception of Carpathian Ruthenia, which became part of the Ukrainian SSR (a republic of the Soviet Union). The Communist Party seized power in a coup in 1948. From 1948 to 1989, Czechoslovakia was part of the Eastern Bloc with a planned economy. Its economic status was formalized in membership of Comecon from 1949 and its defense status in the Warsaw Pact of 1955. A period of political liberalization in 1968, the Prague Spring, ended when the Soviet Union, assisted by other Warsaw Pact countries, invaded Czechoslovakia. In 1989, as Marxist–Leninist governments and communism were ending all over Central and Eastern Europe, Czechoslovaks peacefully deposed their communist government during the Velvet Revolution, which began on 17 November 1989 and ended 11 days later on 28 November when all of the top Communist leaders and Communist party itself resigned. On 31 December 1992, Czechoslovakia split peacefully into the two sovereign states of the Czech Republic and Slovakia.

A series of major student, intellectual and other protests against the ruling Polish United Workers' Party of the Polish People's Republic took place in Poland in March 1968. The crisis led to the suppression of student strikes by security forces in all major academic centres across the country and the subsequent repression of the Polish dissident movement. It was also accompanied by mass emigration following an antisemitic (branded "anti-Zionist") campaign waged by the minister of internal affairs, General Mieczysław Moczar, with the approval of First Secretary Władysław Gomułka of the Polish United Workers' Party (PZPR). The protests overlapped with the events of the Prague Spring in neighboring Czechoslovakia – raising new hopes of democratic reforms among the intelligentsia. The Czechoslovak unrest culminated in the Warsaw Pact invasion of Czechoslovakia on 20 August 1968.

The anti-Zionist campaign began in 1967, and was carried out in conjunction with the USSR's withdrawal of all diplomatic relations with Israel after the Six-Day War, but also involved a power struggle within the PZPR itself. The subsequent purges within the ruling party, led by Moczar and his faction, failed to topple Gomułka's government but resulted in an exile from Poland of thousands of communist individuals of Jewish ancestry, including professionals, party officials and secret police functionaries appointed by Joseph Stalin following the Second World War. In carefully staged public displays of support, factory workers across Poland were assembled to publicly denounce Zionism. At least 13,000 Poles of Jewish origin emigrated in 1968–1972 as a result of being fired from their positions and various other forms of harassment.

Václav Havel (Czech: [ˈvaːt͡slav ˈɦavɛl] ; 5 October 1936 – 18 December 2011) was a Czech statesman, author, poet, playwright, and dissident. Havel served as the last president of Czechoslovakia from 1989 until 1992, prior to the dissolution of Czechoslovakia on 31 December, before he became the first president of the Czech Republic from 1993 to 2003. He was the first democratically elected president of either country after the fall of communism. As a writer of Czech literature, he is known for his plays, essays and memoirs.

His educational opportunities having been limited by his bourgeois background under the Czechoslovak Socialist Republic, Havel first rose to prominence as a playwright. In works such as The Garden Party and The Memorandum, Havel used an absurdist style to criticize the Communist system. After participating in the Prague Spring and being blacklisted after the Warsaw Pact invasion of Czechoslovakia, he became more politically active and helped found several dissident initiatives, including Charter 77 and the Committee for the Defense of the Unjustly Prosecuted. His political activities brought him under the surveillance of the StB secret police, and he spent several periods as a political prisoner, the longest of his imprisoned terms being nearly four years, between 1979 and 1983.

The Prague Spring (Czech: Pražské jaro; Slovak: Pražská jar) was a period of political liberalization and mass protest in the Czechoslovak Socialist Republic. It began on 5 January 1968, when reformist Alexander Dubček was elected First Secretary of the Communist Party of Czechoslovakia (KSČ), and continued until 21 August 1968, when the Soviet Union and three other Warsaw Pact members (Bulgaria, Hungary and Poland) invaded the country to suppress the reforms.

The Prague Spring reforms were an attempt by Dubček to grant additional rights to the citizens of Czechoslovakia in an act of partial decentralization of the economy and democratization. The freedoms granted included a loosening of restrictions on the media, speech and travel. After national discussion of dividing the country into a federation of three republics, Bohemia, Moravia–Silesia and Slovakia, Dubček oversaw the decision to split into two, the Czech Socialist Republic and Slovak Socialist Republic. This dual federation was the only formal change that survived the invasion.

The Sino-Soviet border conflict, also known as the Sino-Soviet crisis, was a seven-month undeclared military conflict between the Soviet Union and China in 1969, following the Sino-Soviet split. The most serious border clash, which brought the world's two largest socialist states to the brink of war, occurred near Damansky (Zhenbao) Island on the Ussuri (Wusuli) River in Manchuria. Clashes also took place in Xinjiang.

In 1964, the Chinese revisited the matter of the Sino-Soviet border demarcated in the 19th century, originally imposed upon the Qing dynasty by the Russian Empire by way of unequal treaties. Negotiations broke down amid heightening tensions and both sides began dramatically increasing military presence along the border. Sino-Soviet relations worsened further following the Soviet invasion of Czechoslovakia in 1968. Border confrontations escalated in March 1969 when a group of People's Liberation Army troops engaged Soviet border guards on Zhenbao Island in Manchuria, resulting in considerable casualties on both sides. Further clashes occurred in August at Tielieketi in Xinjiang and raised the prospect of an all-out nuclear exchange. The crisis de-escalated after Soviet Premier Alexei Kosygin met with Chinese Premier Zhou Enlai in September, and a ceasefire was ordered with a return to the status quo ante bellum.

Alexander Dubček (Slovak pronunciation: [ˈaleksander ˈduptʂek]; 27 November 1921 – 7 November 1992) was a Czechoslovak and later Slovak statesman who served as the First Secretary of the Presidium of the Central Committee of the Communist Party of Czechoslovakia (KSČ) (de facto leader of Czechoslovakia) from January 1968 to April 1969 and as Chairman of the Federal Assembly from 1989 to 1992 following the Velvet Revolution. He oversaw significant reforms to the communist system during a period that became known as the Prague Spring, but his reforms were reversed and he was eventually sidelined following the Warsaw Pact invasion in August 1968.

Best known by the slogan, "Socialism with a human face", Dubček led a process that accelerated cultural and economic liberalization in Czechoslovakia. Reforms were opposed by conservatives inside the party who benefited from the Stalinist economy, as well as interests in the neighbouring Soviet-bloc who feared contagion, western subversion, strategic vulnerability, and loss of institutional power. For reasons of institutional interests in the Soviet Union such as those of the military and KGB, false reports, and the growing concern among the Soviet leadership that Dubček was no longer able to maintain control of the country, Czechoslovakia was invaded by half a million Soviet-led Warsaw Pact troops on the night of 20–21 August 1968. This was intended to enable a coup by conservative forces. That coup, however, could not materialize due to lack of a viable pro-Soviet replacement leadership and the unexpected extraordinary popularity of Dubček and the reformist leadership. Soviet intervention ushered in a period of maneuver between conservatives and reformers where conservatives relied on Soviet influence to shift the balance of power, reversing reforms of the Prague Spring.

The Bulgarian People's Army (Bulgarian: Българска народна армия, БНА, romanized: Balgarska narodna armiya, BNA) was the army of the People's Republic of Bulgaria. It comprised the Bulgarian Land Forces, Air Force and Air Defence, Navy and supporting arms. Bulgaria was one of the signatories of the Warsaw Pact. Along with troops from other Warsaw Pact countries, the BNA participated in the Warsaw Pact invasion of Czechoslovakia in 1968. However, other than this, the BNA did not see any combat during its existence. The Bulgarian People's Army was dissolved along with the People's Republic of Bulgaria in 1990 and was succeeded by the Bulgarian Armed Forces.