As Kitbuqa marched his army west across the Jordan and up the rising slope of the Plain of Esdraelon, Qutuz took his position at Ain Jalut, the Spring of Goliath, where the plain narrowed to just three miles wide, with the steep slope of Mount Giloa to the south and the hills of Galilee to the north. By now Qutuz was aware that he greatly outnumbered the Mongol invaders, so he hid substantial units of cavalry in the nearby hills. Kitbuqa, apparently believing that the army in front of him was the entire Egyptian force, immediately ordered the charge, which he led himself. Riding to meet him, the Egyptian vanguard was led by Baibars.
After a stalemate clash on the battle plain, Baibars used the very old Muslim tactic of the retreat, and the Mongols rode in pursuit into the hills, where they were suddenly and quickly overwhelmed by the Egyptian cavalry reserves. Kitbuqa was brought before Qutuz, and uttered in his last words an insult to the usurper Sultan: Since I was born I have been the slave of my Khan; I am not, like you, the murderer of my master! And then his head was chopped off and mailed back to Cairo. Egyptian cavalry pursued the Mongols to their last stand on the west bank of the Jordan, where they were permanently dispersed.
Anybody who plays Civ or Medieval Total War knows what would have happened if the Mongols had managed to subdue Egypt: a quick march through Libya, Algeria, Tunisia, and Morocco, from where they would have circled Europe from Poland to Gibraltar. Islam would have been largely crushed as a historical force and so might Europe. The Battle of Ain Jalut is a big event in Middle East history classes, and one of the PLOs brigades is named after the battle.
The Egyptians retook Damascus, Aleppo, and the other major cities of Syria. Baibars asked to be made emirate of Aleppo but Qutuz wasnt having it. Before they returned to Cairo Baibars put a sword through Qutuz and entered the city as the new Sultan. His name would become a bogeyman to the Crusaders children in the Holy Land in the decades to come as he waged the bloody warfare that would ultimately drive the Europeans out of the Holy Land for the next millennium.