Two-plus-Four Treaty

Two-plus-Four Treaty
Name	Two-plus-Four Treaty
Long name	Treaty on the Final Settlement with Respect to Germany
Date signed	12 September 1990
Location signed	Moscow
Parties	Federal Republic of Germany, German Democratic Republic, United States of America, Union of Soviet Socialist Republics, United Kingdom of Great Britain and Northern Ireland, French Republic
Effective date	15 March 1991

Two-plus-Four Treaty The Treaty on the Final Settlement with Respect to Germany concluded negotiations that sealed the external aspects of German reunification, resolving Cold War-era occupation questions and confirming borders and military arrangements. Negotiated by the two German states and the four Allied powers that had occupied Germany after World War II, the agreement shaped relations among NATO, the Warsaw Pact, the European Communities, and the major powers including the United States, the Soviet Union, the United Kingdom, and France.

Background and Negotiation Context

The treaty emerged from a sequence of events rooted in the Soviet Union's policies under Mikhail Gorbachev, the collapse of the Eastern Bloc, and popular movements such as the Peaceful Revolution in the German Democratic Republic and the Fall of the Berlin Wall. International negotiations were influenced by prior instruments including the Potsdam Agreement, the Yalta Conference, and postwar arrangements involving the Allied Control Council, while contemporaneous frameworks such as the Treaty of Rome, the European Coal and Steel Community, and the evolving European Union context informed Western approaches. Key diplomatic interactions took place among leaders including Helmut Kohl, George H. W. Bush, François Mitterrand, Margaret Thatcher, and Eduard Shevardnadze-era actors, with negotiating teams drawing on precedents from the Paris Peace Treaties, the Treaty on Conventional Armed Forces in Europe, and the CSCE process culminating in the Charter of Paris. The German question prompted consultations with states beyond Europe such as Canada and Japan and involved institutions like the United Nations and the International Monetary Fund for economic transition planning.

Parties and Key Provisions

Signatories included the two German states—Federal Republic of Germany and German Democratic Republic—and the four wartime Allies: the Union of Soviet Socialist Republics, the United States of America, the United Kingdom of Great Britain and Northern Ireland, and the French Republic. The treaty affirmed the inviolability of the German–Polish border and accepted the existing frontiers established after World War II, thereby addressing claims related to areas such as Silesia and East Prussia. It provided for full sovereignty of a unified Germany within internationally recognized borders, set conditions for NATO membership, and delineated limitations tied to conventional forces following models like the Treaty on Conventional Armed Forces in Europe and arms-control dialogues involving START I and INF Treaty negotiators. Provisions referenced the role of institutions such as the Bundestag, the Bundesrat, and the Stasi Records Agency in implementing domestic legal transitions, and established commitments involving the European Council and the Council of Europe.

Implementation and Legal Effects

The treaty's entry into force required ratification by the signatories and domestic steps such as the accession of the German Democratic Republic to the Basic Law for the Federal Republic of Germany and the incorporation of treaties like the Treaty on the Final Settlement with Respect to Germany into national law. It superseded aspects of the Allied occupation statute and terminated the special rights of the Allied Control Council, affecting legal status in areas governed by instruments like the Potsdam Agreement. Implementation intersected with measures from the International Court of Justice jurisprudence on state succession and with European legal norms shaped by the European Court of Human Rights and the European Atomic Energy Community. Economic and administrative integration involved coordination with institutions including the Deutsche Bundesbank, the European Central Bank's predecessors, and the Organisation for Economic Co-operation and Development.

Military and Territorial Clauses

The treaty specified quantitative and geographic limits on armed forces, influenced by prior arrangements under the Treaty on Conventional Armed Forces in Europe and discussions in forums like the Conference on Security and Co-operation in Europe. It regulated NATO basing and the withdrawal of Soviet Armed Forces in Germany, including timelines consistent with commitments recorded by military planners from the Bundeswehr, the Red Army, and NATO commands such as SHAPE and national staffs from France and the United Kingdom. Territorial clauses affirmed the Oder–Neisse line as Germany's eastern boundary, resolving disputes linked to post‑World War II settlements like those at Potsdam and preventing claims on territories such as Danzig or Königsberg (now Kaliningrad). Provisions affected armament categories considered under START I and the INF Treaty and established protocols for transparency and confidence‑building measures monitored by organizations including the OSCE.

Political and Diplomatic Impact

The treaty reshaped European security architecture by enabling the full sovereignty of a unified Germany while accommodating concerns from the Soviet Union and successor states such as the Russian Federation. It influenced NATO expansion debates alongside later agreements like the NATO–Russia Founding Act and events involving figures such as Vladimir Putin and Wojciech Jaruzelski. The settlement affected relations with neighbors including Poland, the Czech Republic, and Lithuania, and interacted with European integration milestones like the Maastricht Treaty and enlargement rounds involving countries from the Visegrád Group. Diplomatic ramifications extended to transatlantic ties between the United States and Europe, and to global actors such as China and India observing the end of the Cold War order.

Legacy and Historical Assessment

Historians and analysts compare the treaty's outcomes with postwar settlements including the Treaty of Versailles and the Paris Peace Treaties, debating its role in enabling stability that underpinned expansions of the European Union and NATO. Scholars reference archival materials from ministries including the Federal Foreign Office and the Russian Foreign Ministry and the memoirs of statesmen like Helmut Kohl and James Baker to assess bargaining dynamics. The treaty remains central to discussions about sovereignty, security guarantees, and the management of transitions from bipolarity to the contemporary international system, often cited alongside documents such as the Helsinki Final Act and the Two Plus Four negotiations-era communiqués preserved in collections at institutions like the German Historical Museum and the National Archives and Records Administration. Its legacy informs contemporary debates over borders, collective defense, and the sequencing of regional integration.

Category:1990 treaties