Mbh 6.20.2b

And on a golden car unto which were yoked red steeds, the high-souled Drona, bow in hand and with never-failing heart, the preceptor of almost all the kings, remained behind all the troops, protecting them like Indra. And Saradwat’s son, that fighter in the van,[110] that high-souled and mighty bowman, called also Gautama, conversant with all modes of warfare, accompanied by the Sakas, the Kiratas, the Yavanas, and the Pahlavas, took up his position at the northern point of the army. That large force which was well protected by mighty car-warriors of the Vrishni and the Bhoja races, as also by the warriors of Surashtra well-armed and well-acquainted with the uses of weapons, and which was led by Kritavarman, proceeded towards the south of the army. Ten thousand cars of the Samsaptakas who were created for either the death or the fame of Arjuna, and who, accomplished in arms, intended to follow Arjuna at his heels[111] all went out as also the brave Trigartas. In thy army, O Bharata, were a thousand elephants of the foremost fighting powers. Unto each elephant was assigned a century of cars; unto each car, a hundred horsemen; unto each horseman, ten bowmen; and unto each bowman ten combatants armed with sword and shield. Thus, O Bharata, were thy divisions arrayed by Bhishma. Thy generalissimo Bhishma, the son of Santanu, as each day dawned, sometimes disposed thy troops in the human army, sometimes in the celestial, sometimes in the Gandharva, and sometimes in the Asura. Thronged with a large number of Maharathas, and roaring like the very ocean, the Dhartarashtra army, arrayed by Bhishma, stood facing the west for battle. Illimitable as thy army was, O ruler of men, it looked terrible; but the army of the Pandavas, although it was not such (in number), yet seemed to me to be very large and invincible since Kesava and Arjuna were its leader.”