Rubuta ci gaba don wannan sakin layi - Manyan yankuna na ƙasashen Rus, gami da kwarin Kogin Dnieper da yankuna da ke kudu zuwa Bahar Maliya, a wancan lokacin suna ƙarƙashin ikon Lithuania. Don samun iko da waɗannan wurare masu yawa, Lithuanians da Ruthenians sun yi yakin Blue Waters
a cikin 1362 ko 1363 a kan mamayewa Mongols kuma sun yi amfani da ikon vacuum zuwa kudu da gabas wanda ya haifar da lalacewar Mongol na Kievan Rus '. Yawan jama'ar yankin Grand Duchy da aka faɗaɗa ya kasance daidai da Ruthenian da Orthodox na Gabas. Fadada yankin ya haifar da rikici tsakanin Lithuania da Grand Duchy na Moscow, wanda ya sami kansa yana fitowa daga mulkin Tatar kuma kansa yana cikin fadadawa. Musamman a Turai, ƙungiyar ta haɗu da jihohi biyu da ke cikin geographically a bangarorin biyu na babban bambancin wayewa tsakanin yammacin Kirista ko Latin duniya, da kuma gabashin Kirista ko Byzantine duniya.