@Ionus,
"Could have won?"
No kidding Dick Tracy.
And Hitler might have been triumphant if he hadn't tried to conquer Russia during the winter.
With the exception of academic curiosity and speculation, what difference does it make how a power is beaten?
The US was defeated by Vietnam.
The power that is the US is the totality of its military, its media, it politics and its people. If any element of the totality frustrates the military's aims, it still spells defeat.
Irrespective of how hard Britain fought to retain its American colonies, it fought and was defeated. I really doubt that medals were handed out to British Generals on the basis of their efforts in America...with the understanding that the Crown didn't really care...
Why the colonists rebelled and how they behaved after their successful revolution is also immaterial as respects the question of who won and who lost.
If the Libyan rebels closely mimic the American rebels, notwithstanding the the inevitable flaws of the latter, North Africa will be a truly amazing source of replenished democratic energy.