<Ul> <Li> Castra </Li> <Li> Siege engines </Li> </Ul> <Ul> <Li> Triumphal arches </Li> <Li> Roads </Li> </Ul> <Tr> <Th> Political history </Th> </Tr> <Tr> <Th> Strategy and tactics </Th> </Tr>

Who commanded a cohort in the roman army