Which treaty finalized the international settlement allowing German reunification in 1990?

The Two Plus Four Treaty finalized the international settlement allowing German reunification in 1990.

The “two” were the Federal Republic of Germany and the German Democratic Republic. The “four” were the United States, the Soviet Union, the United Kingdom, and France, the four powers that had held special rights over Germany and Berlin since the end of World War II.

The treaty settled external aspects of German unity, including Germany’s borders, sovereignty, and military arrangements. It was signed in Moscow on 12 September 1990 and entered into force after the required ratifications. Its official title was the Treaty on the Final Settlement with Respect to Germany.

The agreement is often described as the diplomatic framework that made reunification internationally acceptable. It did not itself mark the legal reunification date; that occurred on 3 October 1990, when East Germany acceded to the Federal Republic.