Following this AAR of some two AGEoD fans...
http://www.puntadelanza.net/Foro/phpBB2/viewtopic.php?t=6482
One of the players (human vs human) complains that he cannot support his troops in the first winter of the campaign (starting April 1861). He has control of the county or province or whatever, since he controls the city (Harpers Ferry) and inside it there is a serious garrison (I don't know how many but used to be strong, to stop a possible desperate winter attempt by the Northern to recover it. That is, was strong until he had to move troops to recover to Richmond to recover.
He has railroad lines going through originally (and in that moment too) confederate territories, so he should have more than 25% control. His river transport for the city is blocked by the union forces. There is a depot (empty), and he is having to make convoys of carts to supply minimally.
¿A bug? ¿Or there is a reason for this?
He says he is reserving a 2/3 of the railroad capacity for supply matters. He is wondering if his armies are simply too big or the train lines cannot support such a concentration of troops/supply needs.