Tokhtamysh has reunified the Mongol lands from Crimea to Lake Balkhash in just six years.

Having united the Blue and White Hordes into a single state, known to history as the Golden Horde, Tokhtamysh leads a successful campaign against Muscovy in 1382 as a punishment for the Kulikovo defeat and to to force the resumption of their payment of Mongol levies that had been ended in 1380 by the victory of Dmitri, who is now known as Dmitri Donskoi, or Dmitri of the Don.

Timur lends armed support to Tokhtamysh against the Russians.

Tokhtamysh besieges Moscow on August 23, but Muscovites repel the attack, using firearms for the first time in Russian history.

On August 26, two sons of Tokhtamysh's supporter Dmitry of Suzdal, dukes of Suzdal and Nizhny Novgorod Vasily and Semyon, who are present in Tokhtamysh's forces, persuade Muscovites to open the city gates, promising that the attacking forces will not harm the city.

This act allows Tokhtamysh's troops to burst in and destroy Moscow, killing twenty-four thousand people and leaving the city in ashes.