Green: Request for infantry fire support. (For fire support to a target).
Enemy infiltrated players (with multi-account) during custom games mark allied locations to be destroyed by friendly bombing, and thus manage to expel the bomber player and kill enemy infantry.
Press and hold the “V” button to decide which color to use.
I’ll give you credit for a suggestion that isn’t a massive shift to a mechanic, weapon, vehicle or game function with collateral damage and unintended consequences. I expected to read that you also wanted marking removed to players without binoculars.