The ursoid Bulrathi were an almost unstoppable force in ground combat; when they attacked a planet the opposing ground forces were often easily overrun, and attacking one of theirs was even more difficult. Bulrathi fleets preferred large, tough ships. Bulrathi scientists were usually behind other races in computer quality, but their construction methods and weapons were good. Usually aggressive, Bulrathi emperors put an unusual emphasis on their ecologies. Their primary enemies were the Darloks and the Mrrshan; however they trusted the Humans more than other races.