Runs poorly, UI is a confusing mess. Its nice to see a game of this scale and depth but in its current state is not great. Wish they would've put out another Ultimate General Civil War style game instead of this.

You can prevent the rise of the worst country the world has seen in over 200 years

Setting and style are good but I found that this game needs some serious UI and automation help.
First off there is way too much to do in the campaign map, you basically play in on 1/2 speed or pause, from neverending single ship battles to trying to manage an economy and settlement buildings while also trying to wrangle your army so that it stays together there is a ton to be imiproved here. You only have line of sight where your generals are, this is a cool idea but the game map is so gigantic that it winds up having the player basically have 5 cameras that you constantly run around the map trying to find the enemy.

Secondly the battles are dramatically worse than the civil war entry in the ultimate X series. Units stamina is pathetic so that you can never really capitalize on tactical victories or carry momentum. Fresh units behind the lines will be exhausted by the time they reach enemy positions unless you walk there and since the enemy can just walk back you'll never overrun the enemy. Not that this happens much since both armies usually start battles exhausted.
Artillery is singularly useless except as a morale shock unit, unlike in UG CW or any of the gunpowder era TW games canister shot does basically nothing so your best use of artillery is holding fire until you need an enemy to route and then dropping 30+ cannonballs on their head. Also shooting exhausts artillery units so they can't keep up sustained fire without microing them to hold fire every few seconds.

There is a lot of random in the campaign, every battle you fight (no matter how small) and every day will trigger a random event that could be anything from giving you some money to one of your extremely expensive ships deserting to the other side. The "auto resolve" system sucks, a 3rd rate SOL will be at 75% health after auto resolving against a sloop so you have to fight every battle or incur massive casualties.

Both campaigns suffer from the other side getting random re-enforcements that don't make much sense and is very unfun. In the US campaign you'll have to deal with the British spawning armies on ships and landing somewhere on the east coat every few weeks. These armies don't come from the UK they literally spawn in a coastal sea tile and land. In the UK campaign you have to deal with US ships spawning out of the ether in the middle of the sea tiles and ambushing your shipping as you play whackamole and wonder where the US is building ships of the line.

For both Factions the western area of the map is both worthless and a massive liability. A string of forts with no income and no population should be able to be ignored but if they rebel against you the AI will spawn several thousand troops at these locations and run around your armies and raid your rear areas. You only need a few 100 troops to keep these garrisoned but supply limits counts every separate group of soldiers the same, weather its a group of 700 regulars or 150 militia that's 1 supply limit.