<Li> Julian: 361--363 (Sole Emperor). </Li> <P> Julian was proclaimed caesar in 355, before becoming emperor in 361, after Constantius II died of a violent fever in 361 . Julian died in March 363, of wounds sustained during the Battle of Samarra . </P> <Ul> <Li> Jovian: 363--364 (Sole Emperor). </Li> </Ul> <Li> Jovian: 363--364 (Sole Emperor). </Li>

He was the last emperor to rule over a united roman empire prior to its east-west divisions