Never did a great man arise more opportunely than this Dmitri. It was a propitious circumstance, that the dissensions of the Tatars gave them full occupation during the eighteen years subsequent to the first three of his reign:[20] this, in the first place, allowed him time to extinguish the devastating fury of Olgerd the Lithuanian, son of Gedimin, father of Iagello, and conqueror of all Lithuania, Volhinia, Smolensk, Kiev, and even of Taurida; secondly, to unite several principalities with his throne; and lastly, to compel the other princes, and even the prince of Tver, to acknowledge his paramount authority. The contest with the latter was terrible: four times did Dmitri overcome Michael, and four times did the prince of Tver, aided by his son-in-law, the great Olgerd, prince of Lithuania, rise again victorious. In this obstinate conflict, Moscow itself was twice besieged, and must have fallen, had it not been for its stone walls, the recent work of the first regency of the Muscovite boyars. But, at length, Olgerd died; and Dmitri, who, but three years before, could appear only on his knees at the horde, now dared to refuse the khan his tribute, and to put to death the insolent ambassador who had been sent to claim it. We have seen that, fifty years earlier, a similar instance of temerity caused the branch of Tver to fall beneath that of Moscow; but times were changed. The triple alliance of the primate, the boyars, and the grand prince, had now restored to the Russians a confidence in their own strength: they had acquired boldness from a conviction of the power of their grand prince, and from the dissensions of the Tatars. Some bands of the latter, wandering in Muscovy in search of plunder, were defeated; at last the Tatars have fled before the Russians! they are become their slaves, the delusion of their invincibility is no more! The burst of fury which the khan exhibited on learning the murder of his representative, accordingly served as a signal for the confederation of all the Russian princes against the prince of Tver. He was compelled to submit to the grand prince, and to join with him against the horde. _The Battle of the Don or Kulikovo (1380 A.D.)_ [Sidenote: [1380 A.D.]]