A Most Unlikely Ally
I've done this on 2 campaigns now as France. I rush naval tech and upgrade the Marseilles ship yard to dry dock asap. Send my Atlantic flotilla to merge with the Mediterranean one. Invest right away in 3 more 122 gun SOLs then take on and sink Nelson and what are usually 2 additional British ancillary fleets.
Invade and liberate Ireland which Britain (AI) usually leaves virtually undefended, march on Edinburgh and cap it as a French territory.
Next turn after, Britain begged for a Peace Treaty which I was happy to oblige if they would break their alliance with Austria, Sweden and Russia; embargo the same and sign a trade agreement, a military alliance and give me military access as well as a few industrial and naval techs they were ahead of me on.
They shockingly agreed (with a powerful urge to wash) and in spite of remaining hostile and unfriendly through the remainder of the campaign never did renig on the alliance.





