Berke–Hulagu war
The Berke–Hulagu war and the Toluid Civil War as well as the subsequent Kaidu–Kublai war marked a key moment in the fragmentation of the Mongol empire after the death of Möngke , the fourth Great Khan of the Mongol Empire . 
<triplet> Berke–Hulagu war <subj> fragmentation of the Mongol empire <obj> part of <triplet> Kaidu–Kublai war <subj> fragmentation of the Mongol empire <obj> part of