The Great Sejm (1788–1792) convened by Stanislaus Augustus successfully adopted in 1791 the 3 May Constitution, the first set of modern supreme national laws in Europe. However, this document, accused by detractors of harbouring revolutionary sympathies, generated strong opposition from the Commonwealth's aristocracy and conservatives as well as from Catherine, who, determined to prevent the rebirth of a strong Commonwealth set about planning the final dismemberment of the Polish-Lithuanian state. Russia was aided in achieving its goal when the Targowica Confederation, an organisation of Polish nobles, appealed to the Empress for help. In May 1792, Russian forces crossed the Commonwealth's eastern frontier, thus beginning the Polish–Russian War.