The Colonists have never won a battle. 11 of 13 objectives are in British hands, only Philadelphia and Pittsburgh remaining to the Colonists. 18 of 25 objective towns are also in British hands. The British have 925 VPs, the Americans 425. And the British have inflicted 13,867 losses on the Americans, while losing only 3217 men of their own.
Despite this, France allies with America in February of 1778. I find this an extremely improbable result. If the French are going to intervene despite anything the British do, then there is no point in screwing around with a diplomatic system at all.
-- Mal