Britain in a hypothetical 1930s US-Japan war

Would Britain remain neutral in a hypothetical 1930s war between Japan and the United States?

Probably not. Joining the United States would give Britain a powerful ally and make any later European attack a conflict with both leading naval powers.

The hypothetical begins with the idea that killing Charlie Chaplin might trigger a victorious war against a supposedly weak, celebrity-obsessed America. That premise shows how a distorted cultural judgment could shape expectations about national power and willingness to fight. Britain would have strong reasons to abandon neutrality and join the United States. If Britain stayed out, a later European aggressor could confront it without American support. Fighting together in the Far East would instead warn any European challenger that it faced both leading naval powers and their wider imperial resources. This alliance choice would deter threats in Europe as well as shape the Pacific war.