sentences:  Hethum I of Cilician Armenia submitted in 1247, and over the following years encouraged other monarchs to enter into a Christian-Mongol alliance.He sent his brother Sempad to the Mongol court in Karakorum, and Sempad's positive letters about the Mongols were influential in European circles.The Principality of Antioch was one of the earliest Crusader States, founded in 1098 during the First Crusade.