Which country carried out more preemptive strikes, Britain or Japan?
Short answerBritain, by a wide margin. British examples range from gunboat deployments to wars built around preemptive action.
NotesThe short answer places Copenhagen in a much longer British tradition of acting before a perceived threat fully materialized. The terminology varied, with some episodes described as gunboat deployments and others framed as entire wars. This comparison places Pearl Harbor and Copenhagen within a broader history of preemptive strategy.