Russia now began to feel that there were three things which were indispensably necessary to her; the establishment of the direct succession, the concentration of the supreme power, and the union of all parties against the Tatars. The movement in this direction was taken very opportunely; for it happened simultaneously that the Mongolian chief, Mamai, was also disembarrassed of his civil wars (1380), and he hastened with all his forces into Russia to re-establish his slighted authority; but he found the grand prince Dmitri confronting him on the Don, at the head of the combined Russian princes and an army of two hundred thousand[21] men. Dmitri put it to the choice of his troops whether they would go to encounter the foe, who were encamped at no great distance on the opposite shore of the river, or remain on this side and wait the attack? With one voice they declared for going over to the assault. The grand prince immediately transported his battalions across the river, and then turned the vessels adrift, in order to cut off all hopes of escaping by retreat, and inspire his men with a more desperate valour against an enemy who was three times stronger in numbers. The fight began. The Russians defended themselves valiantly against the furious attacks of the Tatars; the hosts of combatants pressed in such numbers to the field of battle, that multitudes of them were trampled under foot by the tumult of men and horses. The Tatars, continually relieved by fresh bodies of soldiers as any part was fatigued by the conflict, seemed at length to have victory on their side. Nothing but the impossibility of getting over the river, and the firm persuasion that death would directly transport them from the hands of the infidel enemy into the mansions of bliss, restrained the Russians from a general flight. But all at once, at the very moment when everything seemed to be lost, a detachment of the grand prince’s army, which he had stationed as a reserve, and which till now had remained inactive and unobserved, came up in full force, fell upon the rear of the Tatars, and threw them into such amazement and terror that they fled, and left the Russians masters of the field. This momentous victory, however, cost them dear; thousands lay dead upon the ground, and the whole army was occupied eight days in burying the bodies of the dead Russians: those of the Tatars were left uninterred upon the ground. It was in harmony of this achievement that Dmitri received his honourable surname of Donskoi.[g] _Significance of Battle of Kulikovo_