The death of Firuz Shah Tughlaq created anarchy and disintegration of the kingdom. The last rulers of this dynasty both called themselves Sultan from 1394 to 1397: Nasir ud-Din Mahmud Shah Tughlaq, the grandson of Firuz Shah Tughlaq who ruled from Delhi, and Nasir ud-Din Nusrat Shah Tughlaq, another relative of Firuz Shah Tughlaq who ruled from Firozabad, which was a few miles from Delhi. The battle between the two relatives continued till Timur's invasion in 1398. Timur, also known as Tamerlane in Western scholarly literature, was the Turkicized Mongol ruler of the Timurid Empire. He became aware of the weakness and quarreling of the rulers of the Delhi Sultanate, so he marched with his army to Delhi, plundering and killing all the way. Estimates for the massacre by Timur in Delhi range from 100,000 to 200,000 people. Timur had no intention of staying in or ruling India. He looted the lands he crossed, then plundered and burnt Delhi. Over five days, Timur and his army raged a massacre. Then he collected wealth, captured women, and enslaved people (particularly skilled artisans), and returning with this loot to Samarkand. The people and lands within the Delhi Sultanate were left in a state of anarchy, chaos, and pestilence. Nasir ud-Din Mahmud Shah Tughlaq, who had fled to Gujarat during Timur's invasion, returned and nominally ruled as the last ruler of Tughlaq dynasty, as a puppet of various factions at the court.