by Steve Carey
Notice that the Redeploy Phase (6.5) is very precise.Troops must leave (6.5.1), and then may leave (6.5.2). Police can then move (6.5.3).
Control markers are previously placed in 6.2, but not removed until 6.6.
So when your Police move in (6.5.3), it's very possible that the only Gov't representation left in the Department is the Gov't control marker.
This is what the game is trying to reflect - Troops take control of a Department, and then Police hold the Department.
A Gov't Base can be of great help in maintaining control in a Department since Troops can remain there, and you can also Train in the space (just be mindful that the Cartels player can Special Activity [Bribe] the Base away for 3 Resources).