erador said:
I really would like to know how did you conquer USA. It looks like quite impossible from where I stand.
well you have to use one gamey tactic again: military control Canada. or they take everything and it takes even lesser time

. when USA isn't at war, they're really isolationist (usually). so they take a long time to mobilize.
just train a few marines and an HQ (I think there's a commando general for France, called Dentz or something). base them and your invasion fleet in Bermuda or Halifax. bring along a reasonably sized conventional army as well. transport the marine army to the coast of any east US coast province (i recommend the Miami area) with a beach. then declare war. make sure you have enough protection for your transports (French, or even better Canadian or British). once you have a beachhead ferry your conventional army in. be sure not to attack from Canada.
from then on, you can encircle and destroy US army divisions however you wish. it's easy going. especially since the Brits will provide you some air and naval protection.
the harder part of the conquest is taking US overseas territories and pacific islands. going from A to B alone takes a month.