Gary Grigsby’s War in the East: The German-Soviet War 1941-1945 is a turn-based World War II strategy game stretching across the entire Eastern Front. Gamers can engage in an epic campaign, including division-sized battles with realistic and historical terrain, weather, orders of battle, logistics and combat results.
The critically and fan-acclaimed Eastern Front mega-game Gary Grigsby’s War in the East just got bigger and better with Gary Grigsby’s War in the East: Don to the Danube! This expansion to the award-winning War in the East comes with a wide array of later war scenarios ranging from short but intense 6 turn bouts like the Battle for Kharkov (1942) to immense 37-turn engagements taking place across multiple nations like Drama on the Danube (Summer 1944 – Spring 1945).
First the button not only show isolated but how far from railhead units are and by definition how much supply they draw.
How far away is the nearest railhead?
It looks as if you are on the extreme edge of the supply range 100MP. Your units will draw supply from the HQ but if the HQ has no supply it can't provide it and the units are too far away to draw it independantly. At the turn start you probably had enough but the attack used it's reserves hence now low on supply.
Note those in bordered yellow are more than 50MP away from railhead, red 100MP.