When did the US and Britain stop treating each other as naval rivals?

When did the United States stop viewing the Royal Navy and Canada as potential opponents?

The strongest mutual rivalry is placed around 1919-1920, with the retreat from invasion thinking during the 1920s and 1930s.

American invasion thinking receded during the 1920s and 1930s in this chronology. The strongest mutual naval rivalry is dated to 1919-1920, when Britain and the United States both regarded the other as a leading potential competitor. War Plan Red is identified as the American plan for war with Britain. The chronology remains broad and gives no precise termination date for every contingency plan.