Actually, you know what game series has done this whole conflict a thousand times better than Ubisoft will? Total War.
Here is, according to my British Grand Campaign, how the American Revolution took place.
First, the Thirteen Colonies called out for someone to rid them of the filthy Spanish and French.
Britain did nothing because its military and naval power in the Americas was pitiful. The Royal Navy spent all its time trying to blockade enemy shipping, and running like hell when the pirates rolled in.
Then the Thirteen Colonies wanted help against the Natives.
Britain, by then, had a strong Navy. She began to amass forces to crush the Pirates, and thus allow free movement of trade goods into and out of the Americas. This was to fund the military push to take Florida from the Spanish and thus secure the Colonial southern flank.
It never happened; open war with Spain and France demanded that Britain invest heavily in protecting her own shores. Anti-piracy operations continued, but with so little resources available any hope of a military operation on the mainland died on the vine.
So the Thirteen Colonies began to lose ground, and as more Native tribes joined the war they again asked Britain for aid.
This time, Britain raised an army, rallied a fleet, and set sail for the Americas. As it passed Iceland, Denmark declared war. The army was diverted to take Iceland, and reinforcements intended for the Americas were likewise diverted. Once again, the threat of war at home meant the Colonies went unheeded.
And so, approximately thirty three years after they first called for aid, the military governor of the Bahamas finally saw his forces land on Florida's eastern shore. Of the Thirteen Colonies there was no sign; what hadn't been taken by the Cherokee now swore allegiance to the United States of America.
When I invade the USA, I won't do so with any malice. In fact, I'll regret having to do it at all. I failed these people; they called out for my aid countless times, and no aid ever came. When the war comes, when the redcoats storm up the east coast and relcaim their now lost Protectorate, it will be for one simple reason; because, left independent, the USA may one day become my enemy. Britain cannot afford that. Without the wealth of the Americas the British Empire would be crippled. Trade flows now, but will it continue to flow tomorrow?
That is a war I can get behind. That is a setting where I can find myself supporting the Americans. It's not because they're fighting for some grand ideal, or because Britain is evil and selfish and they're so damn perfect they fart angel dust. In my American Revolution, both nations are victims, their fates dictated by powers beyond their control. In my Revolution, neither side wins; it's just a question of which side loses more, and whether the people as a whole will be better off when the guns fall silent.