The Muscovite tsars had pursued them with fire and sword.
Thus, for want of funds, Alexander was unable to assist the Grand Master of the Order of the Sword against Muscovite aggression, or prevent Tsar Ivan III.
He certainly left Muscovite society worse than he found it, and so prepared the way for the horrors of "the Great Anarchy."
As these independent Tatar states were always jealous of each other, and their jealousy often broke out in open hostility, it was easy to prevent any combined action on their part; and as in each khanate there were always several pretenders and contending factions, Muscovite diplomacy had little difficulty in weakening them individually and preparing for their annexation.
As the Muscovite and the Lithuano-Polish princes were equally ambitious and equally anxious to widen their borders, they naturally came into conflict.