In this hypothetical, American battlecruiser requirements are shaped by the distance between the Atlantic and Pacific theatres. Armour could be concentrated around essential systems, with the saved weight used for speed and range. That combination would make the ships difficult for Britain to find and contain across two oceans. The design trade-off is protection against the ability to move quickly over great distances.
Notable Point · 7:41-8:34
How American battlecruisers might exploit two oceans
A hypothetical U.S. battlecruiser trades broad armour protection for the speed and endurance needed to operate across the Atlantic and Pacific.