The valley of ‘Ayn Jaaloot is 65 kilometers South of Hitteen, where the Battle of Hattin broke out in 583 A.H., 75 years before that of ‘Ayn Jaaloot, and about 60 kilometers West of Yarmook, where the Battle of Yarmook broke out between the Muslims led by Khaalid ibn Al-Waleed and Abu ‘Ubaydah ibn Al-Jarraah, May Allaah Be Pleased with them, and the Romans nearly six centuries earlier.

Of course, those memories contributed to raising the spirits of the Islamic army to the utmost.
Qutuz, May Allaah Have mercy upon him, found that the valley of ‘Ayn Jaaloot was a very suitable place for the battle. It is a vast plain surrounded by medium-size hillocks from all sides save the northern side, which is open, with an abundance of trees and bushes over those hillocks, fit for hiding places for the Islamic army, making it easy to set up many ambushes along the sides of the valley.
Qutuz, May Allaah Have mercy upon him, arranged his army quickly. He made the forefront of his army led by Baybars in the North of the valley, in an apparent place thereby to induce the Tatar army to come, and hid the remaining of his army behind the hillocks and bushes.

This took place on Ramadhaan 24th 658 A.H., i.e. during the last ten days of the Holy month of Ramadhaan, I mean the month which witnessed early Islamic victories as the noble Battle of Badr, the Conquest of Makkah, and the Conquest of Andalusia. The Muslims waited on the alert, while the Islamic spies continued to transmit the news of Kitbuqa and the Tatar army who had drawn very close to the valley of ‘Ayn Jaaloot.
There remained only a few hours before the horrific clash between the force of the Islamic Ummah and the force of the Tatars would take place.
We ask Allaah The Almighty to Grant permanent victory to Islam and the Muslims.

https://www.islamstory.com/en/artical/21392/To-Ayn-Jaaloot-3