unrest in the city directed at John and the local Greek community. John had little choice but to leave Syria with his ambitions only partially realised. Final campaigns (1142) In early 1142 John campaigned against the Seljuqs of Iconium to secure his lines of communication through Attalia (Antalya). During this campaign his eldest son and co-emperor Alexios died of a fever. Having secured his route, John embarked on a new expedition into Syria determined to reduce Antioch to direct imperial rule. This expedition included a planned pilgrimage to Jerusalem on which he intended to take his army. King Fulk of Jerusalem, fearing that the emperor's presence with overwhelming military force would constrain him to make an act of homage and formally recognise Byzantine suzerainty over his kingdom, begged the emperor to bring only a modest escort. Fulk cited the inability of his largely barren kingdom to support the passage of a substantial army. This lukewarm response resulted in John II deciding to postpone his pilgrimage. John descended rapidly on northern Syria, forcing Joscelin II of Edessa to render hostages, including his daughter, as a guarantee of his good behaviour. He then advanced on Antioch demanding that the city and its citadel be surrendered to him. Raymond of Poitiers played for time, putting the proposal to the vote of the Antiochene general assembly. With the season well advanced John decided to take his army into winter quarters in Cilicia, proposing to renew his attack on Antioch the following year. Death and succession Having prepared his army for a renewed attack on Antioch, John amused himself by hunting wild boar on Mount Taurus in Cilicia, where he accidentally cut himself on the hand with a poisoned arrow. John initially ignored the wound and it became infected. He died a number of days after the accident, on 8 April 1143, probably of septicaemia. It has been suggested that John was assassinated by a conspiracy within the units of his army of Latin origins who were unhappy at fighting their co-religionists of Antioch, and who wanted to place his pro-western son Manuel on the throne. However, there is very little overt support for this hypothesis in the primary sources. John's final action as emperor was to choose Manuel, the younger of his surviving sons, to be his successor. John is recorded as citing two main reasons for choosing Manuel over his older brother Isaac: