Gizmo, serious question here: If, as you say, British troops have repeatedly been fired upon by American troops, surely it must follow that the Brits are remiss in communication? Surely there is incentive in doing one's own part in notification as to troop movements? Surely someone somewhere has thought of a method of swift identification?

In previous eras when smoke signal and semaphore were the epitome of technology, lack of communication was forgivable. That is no longer so.