Potsdam Agreement in the context of "Soviet occupation zone"

The entirety of Germany was occupied and administered by the Allies of World War II, from the Berlin Declaration on 5 June 1945 to the establishment of West Germany on 23 May 1949. Unlike occupied Japan, Nazi Germany was stripped of its sovereignty and its government was entirely dissolved. After Germany formally surrendered on Tuesday, 8 May 1945, the four countries representing the Allies (the United States, United Kingdom, Soviet Union, and France) asserted joint authority and sovereignty through the Allied Control Council (ACC).

Germany after the war was a devastated country – roughly 80 percent of its infrastructure was in need of repair or reconstruction – which helped the idea that Germany was entering a new phase of history ("zero hour"). At first, Allied-occupied Germany was defined as all territories of Germany before the 1938 Nazi annexation of Austria. The Potsdam Agreement on 2 August 1945 defined the new eastern German border by giving Poland and the Soviet Union all regions of Germany east of the Oder–Neisse line (eastern parts of Pomerania, Neumark, Posen-West Prussia, East-Prussia and most of Silesia) and divided the remaining "Germany as a whole" into four occupation zones, each administered by one of the Allies.

Silesians (Silesian: Ślōnzŏki or Ślůnzoki; Silesian German: Schläsinger or Schläsier; German: Schlesier pronounced [ˈʃleːzi̯ɐ] ; Polish: Ślązacy; Czech: Slezané) is both a linguistic as well as a geographical term for the inhabitants of Silesia, a historical region in Central Europe divided by the current national boundaries of Poland, Germany, and Czechia. Historically, the region of Silesia (Lower and Upper) has been inhabited by Polish (West Slavic Lechitic people), Czechs, and Germans. Therefore, the term Silesian can refer to anyone of these ethnic groups. However, in 1945, great demographic changes occurred in the region as a result of the Potsdam Agreement leaving most of the region ethnically Polish and/or Slavic Upper Silesian. The names of Silesia in different languages most likely share their etymology—Polish: Śląsk; German: Schlesien pronounced [ˈʃleːzi̯ən] ; Czech: Slezsko [ˈslɛsko]; Lower Silesian: Schläsing; Silesian: Ślōnsk [ɕlonsk]; Lower Sorbian: Šlazyńska [ˈʃlazɨnʲska]; Upper Sorbian: Šleska [ˈʃlɛska]; Latin, Spanish and English: Silesia; French: Silésie; Dutch: Silezië; Italian: Slesia; Slovak: Sliezsko; Kashubian: Sląsk. The names all relate to the name of a river (now Ślęza) and mountain (Mount Ślęża) in mid-southern Silesia, which served as a place of cult for pagans before Christianization.

Ślęża is listed as one of the numerous Pre-Indo-European topographic names in the region (see old European hydronymy). According to some Polonists, the name Ślęża [ˈɕlɛ̃ʐa] or Ślęż [ɕlɛ̃ʂ] is directly related to the Old Polish words ślęg [ɕlɛŋk] or śląg [ɕlɔŋk], which means dampness, moisture, or humidity. They disagree with the hypothesis of an origin for the name Śląsk [ɕlɔ̃sk] from the name of the Silings tribe, an etymology preferred by some German authors.

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 Allied Control Council (ACC) or Allied Control Authority (German: Alliierter Kontrollrat), also referred to as the Four Powers (Vier Mächte), was the governing body of the Allied occupation zones in Germany (1945–1949/1991) and Austria (1945–1955) following the end of World War II in Europe. Following the defeat of the Nazis, Germany (less its former eastern territories) and Austria were occupied as two different areas, both by the same four Allies. Both were later divided into four zones by the 1 August 1945 Potsdam Agreement. Its members (Four-Power Authorities) were the Soviet Union, the United Kingdom, the United States, and France. The organisation was based in Schöneberg, Berlin.

The council was convened to determine several plans for postwar Europe, including how to change borders and transfer populations in Central Europe. As the four powers had joined themselves into a condominium asserting supreme power in Germany, the Allied Control Council was constituted the sole legal sovereign authority for Germany as a whole, replacing the civil government of Germany under the Nazi Party. In 1948, the Soviets withdrew from the ACC due to its conflict with the western Allies, who then established the Allied High Commission. In 1949, two German states (West and East Germany) were founded.

The Soviet occupation zone in Germany (German: Sowjetische Besatzungszone (SBZ) or Ostzone, lit. 'East Zone'; Russian: Советская оккупационная зона Германии, romanized: Sovetskaya okkupatsionnaya zona Germanii) was an area of Germany that was occupied by the Soviet Union as a communist area, established as a result of the Potsdam Agreement on 2 August 1945. On 7 October 1949 the German Democratic Republic (GDR), commonly referred to in English as East Germany, was formally established in the Soviet occupation zone.

The SBZ was one of the four Allied occupation zones of Germany created at the end of World War II with the Allied victory. According to the Potsdam Agreement, the Soviet Military Administration in Germany (German initials: SMAD) was assigned responsibility for the middle portion of Germany. Eastern Germany beyond the Oder-Neisse line, equal in territory to the SBZ, was to be annexed by the Polish People's Republic and its population expelled, pending a final peace conference with Germany.

The Treaty on the Final Settlement with Respect to Germany (German: Vertrag über die abschließende Regelung in Bezug auf Deutschland),more commonly referred to as the Two Plus Four Agreement (Zwei-plus-Vier-Vertrag),is an international agreement that allowed the reunification of Germany in October 1990. It was negotiated in 1990 between the 'two', the Federal Republic of Germany and the German Democratic Republic, in addition to the Four Powers which had occupied Germany at the end of World War II in Europe: France, the Soviet Union, the United Kingdom, and the United States. The treaty supplanted the 1945 Potsdam Agreement: in it, the Four Powers renounced all rights they had held with regard to Germany, allowing for its reunification as a fully sovereign state the following year. Additionally, the two German states agreed to reconfirm the existing border with Poland in the German–Polish Border Treaty, accepting that German territory post-reunification would consist only of what was presently administered by West and East Germany—renouncing explicitly any possible claims to the former eastern territories of Germany including East Prussia, most of Silesia, and the eastern parts of Brandenburg and Pomerania.