The hq idea gave me another maybe gamey or unrealistic idea.
Suppose Instead of capturing a flag, you had to capture an opposing teams chancelor from his hq, and transport him to your own.
To do this there would be a capital building in the hq.
Once the capital building is destroyed, troops would run in and capture the chanelor, and bring him back onto the goon, m3, or jeep.
The chancelor would be an indestructable object, so incase the transport vehicle was destroyed he would just wait where it happened, until friend or foe picked him up again.
Each countries chancelor's icon could be seen on the map by everyone.
The chancelor icon would be a rook, knight, or bishop.
Probably way to much coding involved.