also, when your taking america, land in provinces that are weak and useless, because AI puts like one or two divisions there, but beware, don't try and make it next to a useful province, because they have a lot of divisions there, and then they can easily reinforce it. Another strategy would be to land in a lot of provinces in the same time so the american troops don't get centered around one province. EVEN another strategy would be just to use the strategy i told you about with Britain. HOPE THIS ALSO HELPED