Would Graf Zeppelin have forced Britain to keep more carriers in the Atlantic?
Short answerProbably, but it could also have prevented pauses in British carrier construction, producing a stronger Royal Navy carrier force sooner.
NotesGraf Zeppelin's threat cannot be assessed while holding British policy fixed. Evidence of a German carrier nearing service could have protected the Illustrious program from Churchill's construction pause and perhaps advanced Implacable, Indefatigable, and Unicorn. Several ships were already well advanced, so avoiding a pause could plausibly move their service dates forward. Earlier British availability would reduce the German ship's window of opportunity and might also make the Royal Navy more protective of existing carriers such as Glorious.