What single message should the Royal Navy receive before the First World War, the Second World War and the Falklands War?
Short answerFix the shell problem and sideline Beatty, build more carriers, and distribute 40 mm close-defence guns across the fleet.
NotesThe deliberately humorous reply carries practical lessons. Before the First World War, the warning would address British shell and ammunition problems and remove Beatty from decisive command. Before the Second World War, it would press the Royal Navy to build many more carriers. Before the Falklands War, it would call for 40 mm close-defence guns across the fleet. A follow-up notes that suitable weapons existed in storage, making rapid adaptation conceivable.