It seems that with the latest patch US garrisons appear on top of Confederate held Forts. It's now late June 1861 and three of my Forts have come under siege overnight. Forts Clinch, Marion and Jackson to be precise.
Lol, you're fast. Wasn't a big problem as in the long run that's probably a suicide run, I hadn't even bothered to raise Militia in the area for the case one of those Forts were to fall.