What was the Duchy of Warsaw created by Napoleon I?

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The Duchy of Warsaw was an independent Polish state established by Napoleon I in 1807 following the Treaties of Tilsit. It served as a focal point for restoring the Polish nation after it had been dismantled by the Partitions of Poland.1

Originally formed from central Polish provinces previously seized by Prussia, the duchy was later expanded in 1809 with territories taken from Austria. Napoleon dictated a constitution for the state based on the French model, which established a strong executive branch led by Frederick Augustus I and implemented the Napoleonic Code.1

The duchy’s existence was tied to Napoleon’s military fortunes. After contributing nearly 98,000 troops to Napoleon’s 1812 campaign against Russia, the state collapsed following the emperor's defeat. In 1813, Russian forces occupied Warsaw, and the Congress of Vienna subsequently partitioned the territory into the Grand Duchy of Poznań, the Republic of Cracow, and the Congress Kingdom of Poland.1