In the 18 March 1990 national election in the GDR an electoral alliance of parties that favored German reunification via article 23 of the Basic Law for the Federal Republic of Germany won a plurality.[1]:229–232[5]:211–214 To achieve unity and full sovereignty, both German states were willing to accept the terms of the Potsdam Agreement that affected Germany.[4] It was then possible for all international parties to negotiate a final settlement.[4]