Ok, so the situation is that I have the main USA Mississippi Valley presence boxed in (next to) St. Louis, but they are strongly entrenched, so I'm hesitant to do the frontal assault thing. It's early June '62.
I can place a division at St. Charles, a strong force in the St. Louis region, a division south of the Meremac, and a division directly east of St. Louis, across the river. I also have swept up most of the armed river flotilla available and have scattered militia/partisans for supply blocking. Further, the dept at (Quincy?) has been destroyed and I control Salem to the east of St. Louis.
My questions:
Can St. Louis supply a strength ~1400+ Union force indefinitely on its own without being directly under siege?
Will emplaced guns at St. Charles/East of St. Louis/in the St. Louis region block river supply from the Missouri River and Mississippi River if they are switched onto bombard (in a separate stack with no leader)? Or will I need to blockade the harbor directly (a pain since it has 2 exits).