What's with the names of the charr npcs in Lake Doric?

Several, if not all, of the generic unnamed charr in Lake Doric are named "Sentinel Legionnaire". Sentinels are charr that are stationed in the Brand. A legionnaire is the leader of a warband.

The sentinel part might be okay, since I think it's actually referenced by the actual legionnaire that's with Logan (can't remember her name), but that still raises the question of why a sentinel warband was sent instead of another one, considering sentinels have one of the most important jobs in Ascalon, keeping back the Brand.

However, the legionnaire part is unacceptable, unless every single one of these characters command their own warband, and if that's the case, where are these warbands?