Joran: I had wanted to play something with realistic supply lines, yet the current implementations are too chunky. This seems just right and I'm quite tempted to buy the game.
In the below example, the Germans (in grey) are supplied by the railroad. The Russians broke through the lines and occupied part of the railroad. The Germans south of the railroad then becomes unsupported.
read the review on Quater-To-Three: http://www.quartertothree.com/fp/2012/03/29/unity-of-command-supply-goes-awry/#more-14318