In the 18th century, Croatia was one of the crown lands that supported Emperor Charles's Pragmatic Sanction of 1713 and supported Empress Maria Theresa in the War of the Austrian Succession of 1741–48. Subsequently, the empress made significant contributions to Croatian matters, by making several changes in the feudal and tax system, administrative control of the Military Frontier, in 1745 administratively united Slavonia with Croatia and in 1767 organized Croatian royal council with the ban on head, however, she ignored and eventually disbanded it in 1779, and Croatia was relegated to just one seat in the governing council of Hungary, held by the ban of Croatia. To fight the Austrian centralization and absolutism, Croats passed their rights to the united government in Hungary, thus to together resist the intentions from Vienna. But the connection with Hungary soon adversely affected the position of Croats, because Magyars in the spring of their nationalism tried to Magyarize Croats, and make Croatia a part of a united Hungary. Because of this pretensions, the constant struggles between Croats and Magyars emerged, and lasted until 1918. Croats were fighting in unfavorable conditions, against both Vienna and Budapest, while divided on Banska Hrvatska, Dalmatia and Military Frontier. In such a time, with the fall of the Venetian Republic in 1797, its possessions in eastern Adriatic mostly came under the authority of France which passed its rights to Austria the same year. Eight years later they were restored to France as the Illyrian Provinces, but won back to the Austrian crown 1815. Though now part of the same empire, Dalmatia and Istria were part of Cisleithania while Croatia and Slavonia were in Hungarian part of the Monarchy.