Here I have some detached forces that are out of supply, apparently:
I'm clueless on how to get these forces back in supply. Maybe the subordinate HQ itself is out of supply, and I must look for the main HQ to get my units back in supply.
On a related note, I love it when the game informs the user why something can't be done:
To develop such a complex game and then give the user absolutely no direction is an absurd way of doing things.
Alan