My first question is how? Portland is practically undefended OTL (and indeed indefensible). Half the British NA&WI Sqn massively overpowers any USN Sqn. Did they provide ship numbers? I suspect (in common with many US written ACW AH's) there's a massive underestimate of British naval strength.
Well, I don't know if it was half, I do know they split their forces. There Order of Battle in Appendix B says there was the IF Black Prince, IF Resistance, SL Sabs Pareil, SL St. George, Fr Phaeton, Fr Mersey, Fr Donegal, Fr Shannon, Fr Ariadne, Fr Melpomene, Cv Racoon, Cv Challenger, Cv Cadamus, Cv Jason, Sl Bulldog, Sl Desperate, Sl Barracouta, Gb Alacrity, Gv Algerine.
IF=Ironclad Frigate, IM=Ironclad Monitor, IR=Ironclad Ram, SL=Ship of the Line, Fr=Frigate, Cv=Corvette, Sl=Sloop, GB=Gunboat, Gv=Gun vessel
The USN had the IM Leigh, IM Montauk, IF New Ironsides, IM Nahant, IM Catskill, IM Patapsco, IM Weahawken, IM Passaic, IR Atlanta, Fr Powhatan, Fr Wabash, Sl Canandaigua, Sl Pawnee, Sl Housatonic, Gb Seneca, Gb Conemaugh, Gb Mahaska, Gb Sonoma, Gb Ottawa, Gb Cimarron, Gb Paul Jones, Gb Unadilla and an experimental submarine.
Tsouras goes into the armaments of these ships in excessive detail (caliber, shot weight, powder charges, etc all footnoted to real books), showing that the British ships were under gunned and would have had great difficulty penetrating the armor of American ironclads except at extreme close range.
Albany? That's further than the OTL warplan envisioned, although understandable if the thrust through NE has failed....
They brush aside militia at the border and used the rail system. Also, the warplan is revised to take into account developments in the last 18 months.
Russia, engaged in Poland, decides to fight the British as well? Well, realistically it's an independent Poland then....
The Russians had the Poles well in hand by now. But it's too early to have seen developments on this front, so I don't know how the British or France plan on intervening there. The Prussians won't be happy with the prospect of an independent Poland though.
Something I have trouble believing. Even if all the Maine troops were recalled to Portland they barely have a strong brigades worth of men....
They did recall all the Maine troops. They repulsed a regimental scale landing on the Portland docks. And then they repulsed the lead brigade (composed of a mix of British regulars and green Canadians) of an attack from the north and then retreated to a trench line they had the militia dig behind a creek.
Lee only has 53,000? In 1863? His command has lost some 20,000 men then somewhere.....
They're in Tennessee with Longstreet