If World War I began in 1919, Britain might enter it with aircraft carriers already available. Prewar design work leading toward HMS Hermes responded to the desire to shoot down Zeppelins. Five additional years could allow that work to produce a carrier force before the fighting starts. This is a counterfactual possibility, with the precise fleet depending on how development continued during the extra peace.
Notable Point · 1:39:57-1:40:39
What a five-year delay to World War I reveals about carriers
Delaying World War I to 1919 could give Britain time to develop carriers for Zeppelin interception before hostilities begin.