In 1350, Dušan attacked Bosnia, seeking to regain the previously lost land of Hum and stop raids on his tributaries at Konavle. Venice sought a settlement between the two but failed. In October he invaded Hum, with an army said to be of 80,000 men, and successfully occupied part of the disputed territory. According to Orbini, Dušan had secretly been in contact with various Bosnian nobles, offering them bribes for support. Many nobles, chiefly of Hum, were ready to betray the Ban, such as the Nikolić family, which was kin to the Nemanjić dynasty. The Bosnian Ban avoided any major confrontation and did not meet Dušan in battle; he instead retired to the mountains and made small hit-and-run actions. Most of Bosnia's fortresses held out, but some nobles submitted to Dušan. The Serbs ravaged much of the countryside. With one army they reached Duvno and Cetina; another reached Krka, on which lay Knin (modern Croatia); and another took Imotski and Novi, where they left garrisons and entered Hum. From this position of strength, Dušan tried to negotiate peace with the Ban, sealing it by the marriage of Dušan's son Uroš with Stephen's daughter Elizabeth, who would receive Hum as her dowry – restoring it to Serbia. The Ban was not willing to consider this proposal.