Did Germany invent combined-arms warfare, and did the Royal Navy contribute little during the First World War?
Short answerNo. British and German forces developed combined-arms methods in parallel, while the Royal Navy secured Allied global movement and contained the High Seas Fleet.
NotesLate-war German stormtroop formations were capable and innovative. British and German combined-arms practice emerged at roughly the same time in this interpretation, with Germany employing it first because its offensive began earlier while Britain coordinated a later Allied offensive. The Royal Navy secured maritime control early in the war, giving Britain and its allies strategic freedom of movement. The Grand Fleet then contained the High Seas Fleet and waited for a sortie. The absence of constant fleet battle reflected successful sea control rather than naval inactivity.