The fleet of a united Britain and North America

How large would the Royal Navy be if the United States had remained part of the United Kingdom?

Probably larger than today's US Navy and organized around roughly twelve carrier battle groups split between Atlantic and Pacific commitments.

A single state spanning Britain, Canada, and the United States would have major commitments in both the Atlantic and Pacific. The scenario sketches about six carrier groups for each ocean, while the combined population, economy, and shipbuilding base could support a force larger than the present US Navy. Greenland and Iceland would also become strategically difficult for such a state to ignore in the nineteenth and early twentieth centuries. The scenario shows how political union, industrial capacity, and maritime geography shape force structure together.