[Levi makes mental notes of this information, even though some of it doesn't seem as though it'll have important application to anything here in Luceti. But he's not going to automatically dismiss anything he learns.]

There are three branches. The Military Police, the Garrison, and the Survey Corps. The Military Police is stationed mainly inside the innermost wall with the royalty and upper class. The Garrison is stationed throughout all three walls, and the Survey Corps conducts scouting missions outside the walls and attempts to chart the territory there.

[Of course, lately the third wall has fallen, and humanity lost one third of what little territory it still possesses to the titans again.]