 Complete the following phrase:  The Mongol invasion of Europe ended in 1242, in part because of the death of the Great Khan Ögedei, successor to Genghis Khan. When one Great Khan died, Mongols from all parts of the empire were recalled to the capital to decide who should be the next Great Khan. In the meantime, the Mongols relentless march westward had displaced the Khawarizmi Turks, who themselves moved west, eventually allying with the Ayyubid Muslims in Egypt. Along the way, the Turks took Jerusalem from the Christians in 1244. After the subsequent loss at the Battle of La Forbie, Christian kings began to prepare for a new crusade the 