The Battle of Ain Jalut (Spring of Goliath)

Location: Near Ayn Jalut, Nazareth, Galilee
Date: September 3, 1260
Result: Mamluk victory

This was the power of The ummah. Fully pushed back the mongols from advancing any more West (Mongols fully destroyed Iraq and Syria then came to their demise after facing Baibars and Qutuz's Mamelukes of Egypt. (This was first recorded battle where guns were used even though they dont show in video)