Thököly's distrust of the Emperor now induced him to turn for help to Sultan Mehmed IV, who gave him the title "King of Upper Hungary" ("Ķıralı Orta Macar") – partly coinciding with present-day Slovakia – on condition that he pay an annual tribute of 40,000 tallers. In the course of the same year Thököly captured fortress after fortress from the Emperor and extended his dominions to the Vág (Slovak: Váh) river. At the two Diets held by him, at Kassa (today "Košice", Slovakia) and Tállya, in 1683, the estates, though not uninfluenced by his personal charm, showed some want of confidence in him, fearing he might sacrifice national independence to the Turkish alliance. They refused therefore to grant him either subsidies or a levy en masse, and he had to take what he wanted by force.