Mbh 8.28.1d

A fierce battle took place there, O Bharata, in which the combatants struck one another with fists or seized one another's hair or wrestled with one another with bare arms. In many instances, combatants, using diverse kinds of weapons, took the lives of combatants engaged with others and, therefore, unperceived by them. During the progress of that general engagement when all the combatants were mangled in battle, hundreds and thousands of headless trunks stood up on the field. Weapons and coats of mail, drenched with gore, looked resplendent, like cloths dyed with gorgeous red. Even thus occurred that fierce battle marked by the awful clash of weapons. Like the mad and roaring current of the Ganga it seemed to fill the whole universe with its uproar. Afflicted with shafts, the warriors failed to distinguish friends from foes. Solicitous of victory, the kings fought on because they thought that fight they should. The warriors slew both friends and foes, with whom they came in contact. The combatants of both the armies were deprived of reason by the heroes of both the armies assailing them with fury. With broken cars, O monarch, the fallen elephants, and steeds lying on the ground, and men laid low, the Earth, miry with gore and flesh, and covered with streams of blood, soon became impassable. Karna slaughtered the Pancalas while Dhananjaya slaughtered the Trigartas. And Bhimasena, O king, slaughtered the Kurus and all the elephant divisions of the latter. Even thus occurred that destruction of troops of both the Kurus and the Pandavas, both parties having been actuated by the desire of winning great fame, at that hour when the Sun had passed the meridian.'"