Complex sentence: Ricimer elevated Libius Severus, of Lucanian origin, to the rank of emperor, after the death of Majorian, in November 461 at Ravenna; the Eastern Roman Emperor Leo I refused to acknowledge him.
Split into simpler sentences: Ricimer elevated Libius Severus, of Lucanian origin, to the rank of emperor, after the death of Majorian, in November 461 at Ravenna. However, the Eastern Roman Emperor Leo I refused to acknowledge him.