When news arrived that the Mongols had crossed the Jordan River in 1260, Sultan Qutuz and his forces proceeded southeast toward the 'Spring Of Goliath' (Known in Arabic as 'Ain Jalut') in the Jezreel Valley. They met the Mongol army of about 20,000 in the Battle of Ain Jalut and fought relentlessly for many hours. The Mamluk leader Baibars mostly implemented hit-and-run tactics in an attempt to lure the Mongol forces into chasing him. Baibars and Qutuz had hidden the bulk of their forces in the hills to wait in ambush for the Mongols to come into range. The Mongol leader Kitbuqa, already provoked by the constant fleeing of Baibars and his troops, decided to march forwards with all his troops on the trail of the fleeing Egyptians. When the Mongols reached the highlands, Egyptians appeared from hiding, and the Mongols found themselves surrounded by enemy forces as the hidden troops hit them from the sides and Qutuz attacked the Mongol rear. Estimates of the size of the Egyptian army range from 24,000 to 120,000. The Mongols broke free of the trap and even mounted a temporarily successful counterattack, but their numbers had been depleted to the point that the outcome was inevitable. Almost the whole Mongol army that had remained in the region, including Kitbuqa, were either killed or captured that day. The battle of Ain Jalut established a high-water mark for the Mongol conquest.