What changes if Bismarck sinks USS New York in May 1941 and brings the United States into the war?
Short answerThe US fleet shifts toward the Atlantic, changing capital-ship deployments and potentially reducing Pearl Harbor's value as a target.
NotesAmerican entry in May 1941 would occur before full military and industrial readiness, but it could still redirect naval deployments. Older battleships might escort Atlantic convoys and newer battleships hunt German surface raiders. Modernised ships could remain in the Pacific, while carriers moved between the theatres. By December, those changes might make Hawaii a less valuable target.