The land of Hlum or Hum had in early times formed part of the kingdom of Doclea, and included, besides the modern Herzegovina, Tribunia (or Travunia), the peninsula of Sabbioncello, a long stretch of Dalmatian coast, and part of Montenegro. In 1015 it was conquered by the Bulgarian Tsars, whose empire had spread to the Adriatic. The Greek Emperor, Basil II. (_Bulgaroktonos_), reconquered it in 1019, and in 1050 the native prince Radoslav drove out the Greeks, and made himself ruler of the country. Among his successors was Bodino, who is said to have besieged Ragusa. During the twelfth century the Servians attacked Doclea, and in 1143 King Radoslav II. asked the Greek Emperor for help against them; but in 1150 Hlum was conquered by Dessa (or Stephen Nemanja), brother of the King of Servia, reoccupied by the Greeks a few years later, and in 1168 added once more to the kingdom of Servia. From 1198 to the beginning of the thirteenth century it was connected with Croatia, after which it returned once more to the Servians. The latter were extremely anxious to possess Hlum, because it afforded them their best opening to the sea (to the north they were cut off by Bosnia and Croatia). In all probability it continued to form part of Servia until added to the Bosnian Banate by Stephen Kotromanić about 1320 or 1330, shorn, however, of Stagno by the Ragusans, as we shall see subsequently.[104] Ragusa was thus surrounded on all her land frontiers by powerful Slavonic states, who at times were friendly, but envied her wealth, and above all her splendid port; of this they tried on more than one occasion to gain possession. Ragusa relied for safety on their own dissensions and on Venetian protection. In the meantime she made the most of her position by exploiting their territory for commercial purposes.