Except in this time line by fighting the Americans in North America the UK is contributing to the defence of the UK by fighting the Americans in North America vs fighting them later closer to or in the UK.I can. I mean weren't the British willing to leave Australia defenseless if push were came to shove and the UK had to choose between itself and Australia.
Edit to add: fighting the Americans in North America does not necessarily equal defending Canada. Although at first glance fighting defensively in Canada does seem like a good way to inflict casulities on the Americans.
Last edited: