The Grand Duchy of Lithuania had insufficient resources to counter Moscow's advances, already having to control the Rus' population within its borders and not being able to count on loyalty of Rus' feudal lords.
Leedu suurvürstiriigil ei olnud piisavalt ressursse Moskva edenemisega võitlemiseks, kes juba kontrollis Vene rahvastikku tema piirides, ja ei saanud arvestada Vene feodaalisandate ustavusega.