stylistic:tone, information:extraction
Polish border

On 14 November 1990, Germany and Poland signed the German–Polish Border Treaty, finalizing Germany's eastern boundary as permanent along the Oder–(Lusatian/Western) Neisse line, and thus, renouncing any claims to most of Silesia, East Brandenburg, Farther Pomerania, and the southern area of the former province of East Prussia (they are called the " Recovered Territories " by Poland as they were once ruled by Piast Poland). The following month, the first all-German free elections since 1932 were held, resulting in an increased majority for the coalition government of Chancellor Helmut Kohl.

As for the German–Polish Border Treaty, it was approved by the Polish Sejm on 26 November 1991 and the German Bundestag on 16 December 1991, and entered into force with the exchange of the instruments of ratification on 16 January 1992. The confirmation of the border between Germany and Poland was required of Germany by the four Allied countries in the Two Plus Four Treaty. The Treaty was later supplemented by the Treaty of Good Neighbourship between the two countries which took effect on 16 January 1992 and ensured the few remaining Germans in Poland (in Upper Silesia) were treated better by the government.