Great TL, have been following it since early days, but haven't commented in a while.
I do have a question not related to the last posts however and extremely belated at that. It is the subject on West Virginia though and fortunately it has been out of focus of this TL and thus I don't think any answer on your part would contradict the TL text.
Specifically, I'd like to address the question of exact borders of West Virginia. We know that CSA ceded the counties opposite of Washington (Alexandria, Fairfax, Prince William and Loudon) and presumably those join West Virginia (there is common border between these counties and the rest of the state). However, I'd like to argue that there is a high probability that the southern part of West Virginia can go to Confederacy instead.
It is well known that almost all counties in south-eastern part of West Virginia voted for secession and didn't vote for creation of new state (see
this and
this maps for reference).
It is less well-known fact though that many of the counties that opposed secession had overwhelmingly confederate sympathies. This can be evidenced if one analyzed recruitment numbers for the Confederacy and the Union. E. g. in
this paper data from 6 counties is analyzed (namely Cabell an Wayne in the south-western corner of the state, Jefferson and Hampshire in the panhandle and Ohio and Monongalia from the north) and it turns out that the two south-western counties gave a lot more soldiers to Confederacy than to the Union (the same is true for panhandle counties too) and overwhelming majority of Union recruits accredited to these counties come from other states (the same can be said even about the two northern counties).
Of course, confederate sympathies have limited impact on the post-war borders. After all, counties opposite of Washington as well as those in panhandle definitely were pro-confederate which didn’t prevent them from staying in the Union. However, unlike these counties southern West Virginia has pretty negligent strategic importance.
Finally, I would also argue that there is high probability that unlike IOTL southern WV stayed under Confederate control for most part of the war.
IOTL in September 1862 William Loring led a successful campaign that established Confederate control over Kanawha Valley including its capital city Charleston with Union troops forced to retreat into Ohio. IOTL these gains were very sort-lived as Loring had quarrels with central command and Lee needed reinforcements after defeat at Antietam. However, ITTL the situation is much, much grimmer for the Union. August and September 1862 are perhaps worst months of the war for the North, they are beaten on every front: in Tennessee, in Kentucky, in Virginia, in Canada, in Maine and every front desperately needs reinforcements. Union simply cannot afford a sizable detachment in Kanawha Valley as its strategic importance is negligent relative to other fronts. Even if the valley is not evacuated before confederates arrive (which IMHO is extremely probable), I don’t think there is a single reason for the Union to push back into Kanawha instead of reinforcing other more important fronts (e. g. Kentucky where confederates have taken the state capital and threaten Louisville).
One could possibly argue that while in general in August-September 1862 the Union’s situation ITTL is much worse than IOTL, specifically in Virginia it is better. McClellan is beaten, but he is beaten on Rappahannock instead of OTL unimpressive victory in Maryland. However, I think that ITTL after the second battle of Centerville Confederacy definitely can send a detachment to Kanawha in order to get a relatively easy victory and get a better access to recruitment in the region, while Union even if hasn’t evacuated the region beforehand simply cannot allow its troops to get bogged down in the unimportant theatre while there is crisis everywhere else.
If Confederates do indeed capture the southern West Virginia in the second half of 1862, I think there is high chance that they would hold it for duration of the war (with the possible exception of the final period). There is a good reason for CSA to have a reasonable garrison in the region as it will appease the Virginian lobby, would provide a link with Confederate-controlled Kentucky and will be more than compensated with additional recruits from here (as mentioned in the beginning of the post, even IOTL even the counties that voted against secession provided a lot more recruits to the CSA than to the Union). While Union is able to amass the army necessary to clear Kanawha valley from confederates (at least in the latter part of the war), it has relatively low incentive to do it. As long as confederates don’t attempt to cut B&O railway, the rebel presence here provide no threat for the North. Of course, it is better to control the region instead of letting the enemy to control it, but pretty much for the entire duration of war Union has higher priority targets and if there are extra troops that could be used to clear Kanawha, it makes more sense for Union to send them elsewhere.
To sum up while Union can in theory recapture the region in late 1864 or 1865, I don’t think it would bother, and even if it will, the critical periods are between presumably August 1862 (when IOTL the Dismemberment Ordinance was signed IOTL) and the summer of 1863 (when Lincoln admits the new state to the Union ITTL) and the final part of the war.
Presumably ITTL in August 1862 Lincoln has other more pressing matters, so the Ordinance would be signed later in the year when the situation settles down a little bit. If this is true it means that ITTL the Ordinance would be signed when Confederates still control the southern half of West Virginia. While the Confederate control of specific counties does not prevent Lincoln to include those in the ordinance, I do think that if before signing it CSA has a firm control over large part of the state, the ordinance can be more moderate, especially if there is enthusiastic recruitment to the rebel army in it (at least the OTL ordinance did not include the counties along current Virginia-West Virginia border that confederates had definitive control in the Summer 1862).
Of course, the absence of certain counties in the ordinance or rebel control over them does not prevent Lincoln from including them in the state when it is admitted, nor does it prevent Union from capturing the counties later and/or demanding them as part of peace negotiations. On the other hand, I don’t think that if the confederates do indeed control southern West Virginia, it would be an important point for Union during peace negotiations.
Even if these counties are included in the state during its admittance to the Union, I think they can be “exchanged” for the 4 counties opposite of Washington that were not included in it(it makes a lot of sense from strategic point of view for the Union and could be a lot easier pill to swallow for Confederates )
What counties are likely to stay in Virginia if the arguments above a valid (see
this map for reference)?
A more moderate scenario is everything to the south of line Mason-Putnam-Kanawha-Clay-Nicholas-Greenbrier- Pocahontas (17 counties in total, with the population of 110000 people in 1860). A more pro-confederate scenario is adding counties Jackson, Roane, Calhoun, Gilmer, Braxton, Webster, Randolph and Pendlton (25 counties in total with the population of 148000 in 1860).
The latter scenario in particular leaves in Confederacy virtually all the counties out of immediate vicinity of B&O railway that voted for secession, had large slave populations or known rebel sympathies.
IOTL WV population was 377 thousand people in 1860, 4 counties opposite of Washington 55000.
Thus, if all OTL WV is in the Union, the state has 54 counties and the population of 432000 in 1860.
In the moderate scenario WV has 37 counties and the population of 321000 in 1860.
In the maximist scenario WV has 29 counties and the population of 284000 in 1860.
Even in the latter scenario WV is in the same tier populationwise as New Hampshire and Vermont (a bit less in 1860, a bit more in 1870)