As the CSA, I have surrounded Washington DC, having captured all of the provinces in Maryland and Virginia that abut the city. Also, I have blocked the Potomac River with four iron clads.
My blockade has been on going since the fall of 1862 and it is now spring of 1863. I anticipate attacking the city with Beauregard's and Lee's two armies shortly. The city is garrisoned by a very large Union army.
My question revolves around the supply phase of this game. Since I have had control of the surrounding provinces to Washington, DC and have blockaded the Potomac river, will this have a negative impact in the upcoming battle? Will the Union forces have suffered any out of supply penalty over the past winter?