His predecessor as king of Burundi was his father Mwezi III of Burundi. In Mutaga's life there had been conflicts with Ruanda. Fights that had begun with Burundis expansion northward ended when Mutaga married Rujugira, the daughter of Ruanda's king. These wars restarted in later years and he died in
Butare.
Mwambutsa I became his successor. ==References==