War Games scenario

[Rikolus]

I like this scenario, and especially cool to have American vs. British forces. But the scenario is so lop-sided. We have played several times, and the Brits win easily.... often the Americans can barely break out of their initial area! Is there something we are missing?
I wish I had the tech skill to be able to Modify the scenario, adding more PPs and/or units to the American side to make it more of a fair battle. Anyway, if someone has a strategy for this one, would enjoy hearing it.