So really your countrymen did'nt have the ability to do it on their own, they needed the help of the treacherous Frogs?
Indeed. At the time, the military might of the UK far, far exceeded that of the fledgling US. My history is a bit weak, but it is my recollection that the UK was a bit distracted with France at the time, so they could not commit anywhere near their entire force to the colonies. IIRC, the French didn't do a whole lot of fighting, but when they showed up to the rear of the British lines in Yorktown, the Brit commander realized the battle was lost.
Regarding Gen. Washington, he lost the vast majority of his battles. But won the war.
OFBSLF