The last stage in the Growth of the Ottoman Empire brought increased pressures on Wallachia: political control was accompanied by Ottoman economical hegemony, the discarding of the capital in Târgoviște in favour of Bucharest (closer to the Ottoman border, and a rapidly growing trade center), the establishment of serfdom under Michael the Brave as a measure to increase manorial revenues, and the decrease in importance of low-ranking boyars (threatened with extinction, they took part in the "seimeni" rebellion of 1655). Furthermore, the growing importance of appointment to high office in front of land ownership brought about an influx of Greek and Levantine families, a process already resented by locals during the rules of Radu Mihnea in the early 17th century. Matei Basarab, a boyar appointee, brought a long period of relative peace (1632–1654), with the noted exception of the 1653 Battle of Finta, fought between Wallachians and the troops of Moldavian prince Vasile Lupu—ending in disaster for the latter, who was replaced with Prince Matei's favourite, Gheorghe Ștefan, on the throne in Iași. A close alliance between Gheorghe Ștefan and Matei's successor Constantin Șerban was maintained by Transylvania's George II Rákóczi, but their designs for independence from Ottoman rule were crushed by the troops of Mehmed IV in 1658–1659. The reigns of Gheorghe Ghica and Grigore I Ghica, the sultan's favourites, signified attempts to prevent such incidents; however, they were also the onset of a violent clash between the Băleanu and Cantacuzino boyar families, which was to mark Wallachia's history until the 1680s. The Cantacuzinos, threatened by the alliance between the Băleanus and the Ghicas, backed their own choice of princes (Antonie Vodă din Popești and George Ducas) before promoting themselves—with the ascension of Șerban Cantacuzino (1678–1688).