The First Battle of Tarain
Size of the armies and generals
The total Rajput army is estimated at 50,000 with cavalry at 20,000 by the modern historians. The Muslim army was estimated at 35,000 cavalry (including camels, of which the numbers unknown), 20,000 infantry with 10,000 in either wing and a few thousand rearguard. The Ghori army, consisted mainly of Central Asian Turkic slaves(Mamluks), coming from horse breeding regions, and was dominated by cavalry.
According to Firishta, who was a Persian historian, the Rajput army consisted of 3,000 elephants, 3,000,000 cavalry and infantry.[2] Most historians, however, believe these figures are exaggerated. The Persian historian were ordered by the Muslim emperors (Ghori) at that time to exaggerate the figures, hence rendering Persian history unreliable.
Battle
In 1191, Muhammad Ghauri threw the gauntlet by laying siege to the fortress of Bhatinda in East Punjab which was on the frontier of Prithiviraj's domains. Prithviraj's appeal for help from his father-in-law was scornfully rejected by the haughty Jaichandra. But undaunted Prithviraj marched on to Bhatinda and met his enemy at a place called Tarain (also called Taraori) near the ancient town of Thanesar. Ghauri attempted the same tactics employed by Mahmud of Ghazni but wasn't successful and he was routed and chased for nearly 40 miles by Prithviraj. In face of the persistent Rajput attacks, the Ghori army broke ranks and fled, ghauri was injured and escaped with the help of his loyal servants from the battlefield.
Aftermath
Ghauri's defeated army retreated to Lahore and, thereafter, returned to Ghazni. Prithvi Raj ignored the advice of his advisers and did not pursue the retreating army, which was a decision he later regretted.