How might HMS Repulse have affected the Battle of the Java Sea if she had survived Force Z?
Short answerHer guns would matter, but the larger change might be a senior British admiral and staff reshaping ABDA command and operations.
NotesA surviving Repulse would have added speed, heavy guns, and a highly experienced crew to the Allied force in Southeast Asia. The larger consequence might have been command more than firepower. A capital ship could have arrived with a senior British admiral and staff able to influence Dutch command arrangements, operational planning, and where the force fought. That change could ripple through the Battle of the Java Sea even if no single gunnery outcome can be predicted. The counterfactual therefore turns on institutions and staff capacity alongside the extra ship in the order of battle.