Baldwin of Ibelin year, the king betrothed his younger half-sister Isabella of Jerusalem, Balian's stepdaughter, to Humphrey IV of Toron, to further reduce the Ibelins' influence. In 1183 he supported Raymond against Guy, who was by now regent for the ailing Baldwin IV. Lord Baldwin was among the barons who advised the king to crown Sibylla's son Baldwin V in 1183, while Baldwin IV was still alive; this was an attempt to prevent Guy from succeeding as king. Baldwin V became sole king while still a child in 1185, and when the young king died in 1186, Sibylla was crowned queen with Guy
Baldwin I of Jerusalem Baldwin and Tancred led two separate contingents. Tancred was the first to leave Heraclea, accompanied by 100–200 troops; Baldwin and his 300 knights departed around 15September. Tancred persuaded the Seljuq garrison of Tarsus to raise his flag on the citadel on 21September, even before his troops were granted access to the town. Baldwin took advantage of the strength of his troops and compelled Tancred to leave Tarsus on the following day. The Turks replaced Tancred's banner with Baldwin's flag and allowed Baldwin to take possession of two towers. Shortly thereafter, about 300 Norman knights arrived, but Baldwin denied entry to