Gray_Lensman wrote:Reading the Shelby Foote Narrative, it seems that there was very little CSA river interdiction of supply except in fort areas. I would tend to agree more with Runyan here and go with the lower max of 2 in 1861. Just my $.02.
The forts were the primary obstacles to anything trying to pass them. Although I haven't read much on supply interdiction to detached formations behind enemy lines outside of forts.
In the past, I know I have read of some sniping by both infantry and artillery on ships moving along rivers. And I suspect a battery of artillery along a river bank could significantly threaten unescorted, unarmored supply ships in reality. How often it actually happened, I don't know. Makes me wonder how much artillery was available and assigned to that purpose. And whether Union gunships would immediately attack any artillery discovered interdicting supply outside of forts.
In game terms, we have two types of river supply. The actual supply steamers which we purchase and physically carries supplies to a detachment. Then we have the generic supply system which puts supply into towns along rivers. The generic supply system is halted by emplaced artillery. While supply steamers have to run the guns if they are entrenched at level 5 or greater and have the bombard option selected.
I see emplaced guns, separate from a full scale fort, interdicting ships as realistically possible, probably effective against unarmored, unescorted generic supply and very useful. A valid game option. I just don't know how often it was actually done historically.
In game terms, it is very helpful for the CSA to have the capability to limit the US massive advantage in ships and potential amphibious operations. From the US perspective, I still find amphibious operations extremely difficult and risky. Although removing supply interdiction really doesn't impact the difficulty and risk of amphibious operations. But if the US doesn't take out the emplaced guns, then more supply transports would have to be used to keep an isolated force supplied.
Having max entrenchments at levels below 5 will definitely remove the interdiction capability which means the CSA will have to devote more supply and artillery to forts if they want to prevent generic supply to Union river invasions. Currently in my mod, I am not sure they have the resources to build many forts.
Basically entrenching guns to interdict supply is creating a temporary fort without the expense of a fort and the large numbers of guns. I also assume entrenched guns will interdict supply even if they do not select the bombardment option.
I picked up a couple books on the Mississippi River campaigns last weekend. I will see if they have any comments.