Original: Khan Tokhtamysh of the Golden Horde overruns Moscow, as punishment for Grand Prince Dmitri Donskoi's resistance to Khan Mamai of the Blue Horde in the 1370s.
Simplified: Khan Tokhtamysh of the Golden Horde, overruns Moscow as punishment for Grand Prince Dmitri Donskoi's resistance to Khan Mamai of the Blue Horde in the 1370s.