Battle of Talas
The numbers of combatants involved in the Battle of Talas are not known with certainty; however, various estimates exist. The Abbasid army (200,000 Muslim troops according to Chinese estimates, though these numbers may be greatly exaggerated) which included contingents from their Tibetan ally met the combined army of 10,000 Tang Chinese and 20,000 Karluk mercenaries (Arab records put the Chinese forces at 100,000 which also may be greatly exaggerated).