Battle of the Margus
The Battle of the Margus was fought in July 285 between the armies of Roman Emperors Diocletian and Carinus in the valley of the Margus River ( today Great Morava ) in Moesia ( present day Serbia ) . 
<triplet> Battle of the Margus <subj> Great Morava <obj> location <triplet> Great Morava <subj> Serbia <obj> country