Socialist Unity Party of Germany in the context of "Communist Party of Germany"

East Germany, officially the German Democratic Republic (GDR), was a country in Central Europe from its formation on 7 October 1949 until its reunification with West Germany (Federal Republic of Germany) on 3 October 1990. Until 1989, it was generally viewed as a communist state and described itself as a socialist workers' and peasants' state. The economy of the country was centrally planned and state-owned. Although the GDR had to pay substantial war reparations to the Soviet Union, its economy became the most successful in the Eastern Bloc.

Before its establishment, the country's territory was administered and occupied by Soviet forces following the Berlin Declaration abolishing German sovereignty in World War II. The Potsdam Agreement established the Soviet-occupied zone, bounded on the east by the Oder–Neiße line. The GDR was dominated by the Socialist Unity Party of Germany (SED), a communist party, before being democratized and liberalized amid the revolutions of 1989; this paved the way for East Germany's reunification with West Germany. Unlike the government of West Germany, the SED did not see its state as the successor to the German Reich (1871–1945). In 1974, it abolished the goal of unification in the constitution. The SED-ruled GDR was often described as a Soviet satellite state; historians describe it as an authoritarian regime.

The Polish United Workers' Party (Polish: Polska Zjednoczona Partia Robotnicza [ˈpɔlska zjɛdnɔˈt͡ʂɔna ˈpartja rɔbɔtˈɲit͡ʂa], PZPR) was the communist party which ruled the Polish People's Republic as a one-party state from 1948 to 1989. The PZPR had led two other legally permitted subordinate minor parties together as the Front of National Unity and later Patriotic Movement for National Rebirth. The Polish United Workers' Party had total control over public institutions in the country as well as the Polish People's Army, the UB and SB security agencies, the Citizens' Militia (MO) police force and the media.

The falsified 1947 Polish legislative election granted the Communist Polish Workers' Party (PPR) complete political authority in post-war Poland. The PZPR was founded forthwith in December 1948 through the unification of the PPR and the Polish Socialist Party (PPS). From 1952 onward, the position of "First Secretary" of the Polish United Workers' Party was de facto equivalent to Poland's head of state. Throughout its existence, the PZPR maintained close ties with ideologically-similar parties of the Eastern Bloc, most notably the Socialist Unity Party of Germany, Communist Party of Czechoslovakia and the Communist Party of the Soviet Union. Between 1948 and 1954, nearly 1.5 million individuals registered as Polish United Workers' Party members, and membership rose to 3 million by 1980.

German reunification (German: Deutsche Wiedervereinigung), also known as the expansion of the Federal Republic of Germany (BRD), was the process of re-establishing Germany as a single sovereign state, which began on 9 November 1989 and culminated on 3 October 1990 with the dissolution of the German Democratic Republic and the integration of its re-established constituent federated states into the Federal Republic of Germany to form present-day Germany. This date was chosen as the customary German Unity Day, and has thereafter been celebrated each year as a national holiday. On the same date, East and West Berlin were also reunified into a single city, which eventually became the capital of Germany.

The East German government, controlled by the Socialist Unity Party of Germany (SED), started to falter on 2 May 1989, when the removal of Hungary's border fence with Austria opened a hole in the Iron Curtain. The border was still closely guarded, but the Pan-European Picnic and the indecisive reaction of the rulers of the Eastern Bloc started off an irreversible movement. It allowed an exodus of thousands of East Germans fleeing to West Germany via Hungary. The Peaceful Revolution, part of the international revolutions of 1989 including a series of protests by East German citizens, led to the fall of the Berlin Wall on 9 November 1989 and the GDR's first free elections on 18 March 1990, and then to negotiations between the two countries that culminated in a Unification Treaty. Other negotiations between the two Germanies and the four occupying powers in Germany produced the Treaty on the Final Settlement with Respect to Germany, which granted on 15 March 1991 full sovereignty to a reunified German state, whose two parts had previously been bound by a number of limitations stemming from their post-World War II status as occupation zones, though it was not until 31 August 1994 that the last Russian occupation troops left Germany.

The Free German Trade Union Federation (FDGB; German: Freier Deutscher Gewerkschaftsbund) was the sole national trade union centre of the German Democratic Republic (GDR or East Germany) from 1946 to 1990. It was a mass organisation and a constituent member of the National Front. The FDGB was a federation of trade unions that nominally represented all workers in East Germany, but in practice was an agency of the ruling Socialist Unity Party of Germany (SED) to enforce ideological conformity in the workplace. The FDGB was dissolved by the De Maizière government shortly before German reunification.

BRD (German: Bundesrepublik Deutschland [ˈbʊndəsʁepuˌbliːk ˈdɔʏtʃlant] ; English: FRG/Federal Republic of Germany) is an unofficial abbreviation for the Federal Republic of Germany, informally known in English as West Germany until 1990, and just Germany since reunification. It was occasionally used in the Federal Republic itself during the early Cold War; it was commonly used between 1968 and 1990 by the ruling party of the German Democratic Republic (East Germany), resulting in a strong deprecation of its use in West Germany. The East German regime had previously used the term "German Federal Republic" (German: Deutsche Bundesrepublik), which it abbreviated as "DBR", to refer to West Germany. The most widely used abbreviation for West Germany in the country itself was its ISO 3166-1 alpha-2 country code "DE", which has remained the country code of reunified Germany.

While the English equivalent FRG was used as an IOC country code and a FIFA trigramme, the use of BRD was strongly discouraged by the authorities of the Federal Republic of Germany itself from the 1970s, because it was considered to be a derogatory communist term following its widespread use in East Germany since 1968; thus the term was regarded as a possible expression of an extremist, anti-constitutional and anti-democratic sentiment by West German authorities. The term was not banned by law, but its use was discouraged or forbidden in schools in West Germany from the 1970s, and treated as an error. As a result of its use by East Germany and the war on the abbreviation by the West German government, far-left terrorists such as the Red Army Faction tended to use the term as a way to attack West Germany; additionally the term "BRD" has been used by some far-right groups for the same purpose. After German reunification, the country is usually referred to simply as Germany (Deutschland), and hence the need for abbreviations is greatly diminished. However, since the end of the Cold War the term "BRD" has lost some of its potency as an insult intended to attack the Federal Republic of Germany, as it was used by East Germany and far-left terrorists such as the Red Army Faction, and the term "BRD" has been listed in the German dictionary Duden as an "unofficial abbreviation" for the Federal Republic of Germany since the 1990s, and is occasionally used by national newspapers across the political spectrum.

The German Democratic Republic, commonly known in English as East Germany or the GDR, was a Marxist-Leninist communist state that existed from 7 October 1949 to 3 October 1990. Politics were dominated by the Socialist Unity Party of Germany (SED) which ruled the country as a one-party state for most of its existence. The Constitution of East Germany created a liberal democratic socialist republic from 1949 until 1968, when a new constitution formalised many of the Marxist-Leninist practices including the "leading role" of the SED.

East Germany was officially governed by a parliamentary system with power invested in the elected Volkskammer, the State Council (from 1960), the Council of Ministers, and the Supreme Court. The SED instituted a de facto Stalinist political system based on the Soviet Union where actual power was held by the SED's Politburo, maintaining a facade of democracy with rigged elections, and all political opposition was subjected to widespread repression.

General elections were held in East Germany on 18 March 1990. These were the first free elections held in the region since the turbulent Weimar days of 1932 and would become the only truly democratic vote in the German Democratic Republic (GDR). The election stood as a final verdict on four decades of one-party rule by the Socialist Unity Party of Germany (SED)–led National Front. It took place against the backdrop of the German reunification process, which had already begun to gather momentum.

The contest was swept by the Alliance for Germany, a coalition led by the newly reconstituted East German Christian Democratic Union (CDU), which captured 192 of the 400 seats in the Volkskammer and had ran on a promise of swift reunification with West Germany. The Social Democratic Party (SPD), re-established only months earlier after its forced 1946 merger with the Communist Party of Germany (KPD), was widely tipped to win but instead came second with 88 seats. In third was the former ruling SED, now rebranded as the Party of Democratic Socialism (PDS), which secured 66 seats. The Alliance fell just short of an outright majority having needed 201 seats to govern alone.