During 1862 you are given the Colored Volunteers option which will give you a 12% increase in conscription on the Draft but it isn't clear what is improved by this. For one thing it says potential whatever that means.
Does it increase the per turn conscription number? I haven't seen a change in that.
Does it only increase the number of conscription companies you get with one of your drafts/volunteer calls? Which?
There have been some posts on this but a search didn't come up with one giving a clear answer. The use of the option tags on a per turn cost with no indicated end. If this only applies to a single volunteer or draft call it wouldn't seem very effective.