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Partitions of Polish–Lithuanian Commonwealth

In 1764, Catherine placed Stanislaus Augustus Poniatowski, her former lover, on the Polish throne. Although the idea of partitioning Poland came from Frederick II of Prussia, Catherine took a leading role in its execution in the 1790s. In 1768, she formally became the protector of the political rights of dissidents and peasants of the Polish–Lithuanian Commonwealth, which provoked an anti-Russian uprising in Poland, the Confederation of Bar (1768–1772), supported by France. After the rebels, their French and European volunteers, and their allied Ottoman Empire had been defeated, she established in the Commonwealth a system of government fully controlled by the Russian Empire through a Permanent Council, under the supervision of her ambassadors and envoys.

Fearing that the May Constitution of Poland (1791) might lead to a resurgence in the power of the Polish–Lithuanian Commonwealth and the growing democratic movements inside the Commonwealth might become a threat to the European monarchies, Catherine decided to refrain from her planned intervention into France and to intervene in Poland instead. She provided support to a Polish anti-reform group known as the Targowica Confederation. After defeating Polish loyalist forces in the Polish–Russian War of 1792 and in the Kościuszko Uprising (1794), Russia completed the partitioning of Poland, dividing all of the remaining Commonwealth territory with Prussia and Austria (1795).