Sat May 02, 2015 7:37 am
Most of the supplies come on the map in Richmond, rather than being collected and forwarded from the Deep South. This is counter to what the manual implies. In fact, according to a year or so old post from Pocus that I cannot now find, large amounts of supplies are actually scripted into the major cities like Richmond, DC, St. Louis, etc. rather than directly produced by structures, so Virginia should be self sufficient in supply unless Richmond falls (this was shown conclusively in one of the AARs). Ammo is more problematic, at some point you may need to build Powder Mills or Armories (or maybe Arsenals, I always get them mixed up) to beef up Ammo production. A lot of people used to report a major ammo crimp late in the war, but I think this was addressed in a patch (I never noticed it, myself). If you get one, then you may need to fill in your supply chain and try to go several turns without using rail movement so you can get the two rail supply phases rather than one or none.
I usually play as the CSA, and I try my best to leave the "minimal" amount of rail points (the 1/3 amount) each turn so that I can get one phase of rail push (which =5 rail regions of supply forwarding). Occasionally I have turns where I get two, but I usually need my rail for troop movement instead. I often go below the 1/3 threshold and don't get a rail push at all, but I try not to do this more than two turns in a row to keep things flowing. The thresholds increase each turn, so you have to build rail just to stay even, which replaces the decay mechanism in AACW.
Overall, I would say that it is more important to focus on providing a robust local network than an interstate one. Depots do more than just move supplies around, they also dramatically speed cohesion and hit recovery, so putting an extra one between Richmond and the front lines gives you an extra tactical hard point to fall back on if you are pushed south, in addition to the supply. Don't let it fall into enemy hands, however, it is extremely hard to push entrenched stacks out of depots, and the supplies that accumulate in depots within range of Richmond can supply a corps sized stack for months. Strongly consider building a depot or two in west-central Virginia, or you will have trouble supplying defenders keeping the back door closed against WV forces infiltrating across the mountains. I use the wagon that gets captured at Norfolk for this.
If you want to make sure you have supply forwarding from the Deep South to Virginia, you will need to build at least one depot in South Carolina, where if you look carefully you will see that there is a gap of 5+ rail regions on both of the two rail lines. You can fill in the coastal route with a flatboat-depot in one of the small towns WSW of Wilmington. The western rail route (that runs through Greenville) will cost a wagon to bridge the gap, as there is not a city in the right spot that you can build a flatboat in.
Flatboats are easy to use and so cheap they feel like an exploit. They can be built in just about any city with a harbor, and are available to convert into depots on the first turn after you buy them. Just select the flatboat and click on the build depot icon just as you would with a wagon. There is a 5 region riverine gap south of Memphis that can be filled in with a flatboat in one of the small towns on the Arkansas side (I forget the name) that will connect New Orleans Memphis. Memphis usually generates/gets scripted all the supplies it needs in my games though, so I don't always take the time/money.