Kammala wannan jumlar: A shekara ta 1362, an raba Golden Horde tsakanin Keldi Beg a Sarai, Bulat Temir a Volga Bulgaria, da Abdullah a Crimea. A halin yanzu, Grand Duchy na Lithuania ya kai hari ga yammacin tributaries na Golden Horde kuma ya ci Kiev da Podolia bayan yakin Blue Waters a 1363. Wani babban janar na Mongol mai suna Mamai ya goyi bayan Abdullah amma ya kasa ɗaukar Sarai, wanda ya ga mulkin wasu khans guda biyu, Murad da Aziz. Abdullah ya mutu a shekara ta 1370 kuma Mamai ya naɗa Muhammad Bolaq a matsayin ɗan marigayi khan. Mamai kuma ya fuskanci tawaye a Nizhny Novgorod. Sojojin Muscovite sun yi karo da yankin Bulgarian na Arab-Shah, ɗan Bulat Temir, wanda ya kama su ba tare da shiri ba kuma ya ci su a bakin Kogin Pyana. Koyaya Arab-Shah bai iya cin gajiyar halin da ake ciki ba saboda ci gaban wani janar na Mongol daga gabas. Da aka karfafa shi da labarin rashin nasarar Muscovite, Mamai ya aika da rundunar soja a kan Dmitri Donskoy, wanda ya ci sojojin Mongol a
Yaƙin Kogin Vozha a 1378. Mamai ya yi hayar Genoese, Circassian, da kuma Alan mercenaries don wani hari a Moscow a 1380. A cikin yaƙin da ya biyo baya, sojojin Mongol sun sake yin nasara a yakin Kulikovo.