ENThis study focuses on the issue of relations Jagiello with Tatar rulers in 80–90th. XIV century. Alliance with Mamay were in Podolian princes Koriyatovichi and Kievan prince Vladimir Olgerdovich, who provided military assistance to Mansur-Kiyat. They stole Mansur-Kiyat (son of Mamay). Moves of Jagiello troops to the border of Rus in 1380 was due to the fear that the muscovite prince Dmitry support lithuanian political refugees Andrey and Dmitry Olgerdovich. In Russian sources Andrey Olgerdovich positive image in the Belarusian-Lithuanian chronicles it is negative, and neutral in Polish chronicles. Positive characteristics due to the participation in the Battle at Kulikovo field, negative – a revolt against Jagiello, neutral – neutral position of the Polish chroniclers regarding the events described. Mamay was not an ally of Jagiello. Muscovite prince Dmitriy in 1381 supported by Andrey Olgerdovich in civil war in Great Duchy of Lithuania. Mansur-Kiyat was to become Sluzhebnyi Tatarin with Vladimir Olgerdovich, Vytautas Glinsky became a vassal after Vytautas conquered Kiev principality of their power and drove Vladimir Olgerdovich. There is no evidence to suggest an alliance Jagiello and Tokhtamish in 1381–1382, That is, before 1384. Keywords: Mamay, Golden Horde, Great Duchy of Lithuania, Koriyatovichi, Jagiello, Mansur-Kiyat, Wladimir Olgerdovich, muscovite prince Dmitriy. [From the publication]