The First Lithuanian Chronicle, the basis for which was written while Vytautas was still alive, describes in detail how wars against Smolensk was waged in 1386, 1395, 1401, and 1404, but mentions nothing about Vytautas and Yuri being in-laws.
Den første litauiske krønike, hvis kerne var skrevet, mens Vytautas stadig var i live, beskriver i detaljer, hvordan krigene mod Smolensk blev ført i 1386, 1395, 1401 og 1404, men nævner intet om, at Vytautas og Jurij var svigerfar og svigersøn.