Mars didn’t pan out, so instead GuardBot is paying tribute to the Roman god of war in a new way. Because it is amphibious, it can go almost anywhere the Marines go, either scouting ahead from rivers or patrolling forward operating bases in marshy terrain. GuardBot isn’t particularly fast: at speeds of only 6 mph on land and 3 mph in water, there’s a reason it’s a guard bot and not a pursuit bot. It can last up to eight hours on one battery charge. The clear domes on the side of GuardBot contain cameras, so it can look in completely opposite directions simultaneously, like a chameleon.