What key details about comentiolus  can be extracted from the following bio?  Bio: comentiolus -lrb- , `` komentiolos '' ; died 602 -rrb- was a prominent eastern roman -lrb- byzantine -rrb- general at the close of the 6th century during the reign of emperor maurice -lrb- r. 582 -- 602 -rrb- . he played a major role in maurice 's balkan campaigns , and fought also in the east against the sassanid persians . comentiolus was ultimately executed in 602 after the byzantine army rebelled against maurice and emperor phocas -lrb- r. 602 -- 610 -rrb- usurped the throne .
A:
- battles is maurice of 572 -- 591 's balkan campaigns , byzantine -- sassanid war- allegiance is east roman empire- name is comentiolus- rank is '' magister militum praesentalis ''