I have not won the campaign as the Americans yet, however i have found coordinating offensives between the British and American forces to be quite effective at moving the front line.

I do this by monitoring the other sides strategic reserves as well as waiting for the British to launch their offensive. If my strategic reserves are high enough i will launch my offensive just as the British offensive seems to be slowing down.

If i work it out right the British reserves have built back up (and so has my prestige points) by the time my American offensive has lost effectiveness. They usually launch an offensive soon after their strategic reserves reach a high enough level.

Through staggering or stair stepping between British and American offensives a lot of ground can be gained if you can time it right.

Im not sure how long this technique will work, and it does seem to falter between German offensives... like i said i havnt won yet. The front is deeper than i have seen it however... about half way through France now.

If anyone uses this technique let me know what you think of it or if anyone esle was able to time it just right.

i have also tried to launch my offensives simultaneously with the British but this doesnt ever seem to help too much. comments anyone?