The Cambridge History of India, Vol. III: Turks and Afghans v3.c20.106

v3.c20.106

Towards the close of the rainy season of 1192 an army of Jāts under a leader named Jatwān, who owed allegiance to Rāja Bhīm of Anhilvāra, invaded the Hānsī district and compelled Nusrat-ud-dīn, the Muslim governor, to take refuge in the fortress. Aibak marched to his relief and in September appeared before Hānsī. The Jāts had fled, but he followed them so closely that they were compelled to turn and meet him and were defeated and lost their leader. Aibak returned to Guhrām and almost immediately set out for Meerut, captured the fortress from the Hindu chieftain who held it, and thus established an outpost to the east of the Jumna.