General Confederation of the Kingdom of Poland (Polish Konfederacja Generalna Królestwa Polskiego) was a Polish confederation established by emperor Napoleon Bonaparte on the eve of his campaign in Russia.
It was formally founded by Sejm of Duchy of Warsaw on 28 June 1812. It re-established a form of government very similar to the former Polish-Lithuanian Commonwealth. The Marshal of the General Council of Confederation was named Adam Kazimierz Czartoryski.
Main goal of its activity was to introduce Polish administration on the territories of Lithuania, Belarus and Ukraine liberated by La Grande Armée from Russian occupation. The confederation ceased to exist on 30 April 1813.
References
General Confederation of the Kingdom of Poland Wikipedia(Text) CC BY-SA