[Lolzytripd]

theres a difference between a Vampire detective and a singapore-esque tolerance to crime and using the hammer you throw at opposing countries at your civilian populace.

Its okay to have police -within- the military, especially when military service is mandatory in times of war, its different however when every member of the military is also a member of the police. This has been true forever, long before we started righting down rights in reality. A military needs thousands of men to ward off their enemies, they don't need nearly as many people for the role of keeping the peace in their own lands. The kind of people that military service attracts is also very different from the kind of people that take up the call to enforce law and order. You historically have the nobility seeking to increase their position in the world joining the officer corps, cavalry, knight hood, etc. while the poor and disenfranchised with not much more to do joining the infantry and serving in hope that their loyalty will bring a change in fortune to their life. Both groups to some degree desire going to war, seeking fame and/or fortune through combat. These armies, legions, hordes, warbands historically loot and plunder cities they capture on their crusades, when in rome, sack, loot and burn it down. Some of these people could be the kind of people that could be guards, but most aren't.