For a laugh, I modified the standard (36-48) scenario to give Ireland all the tech in the game, some 20 carriers, another 40 battleships, 40 cruisers, and 100 destroyers (= # of subs), plus a sizable land army. The timline went like this:
June 1939: Began positioning subs to blockade England's colonies, and transports also set off for India and Burma
August 1939: Joined Axis
September 1939: Germany Invades Poland
October 1939: Began unloading troops in the British Isles and India
Much fighting
March 1941: Invaded Australia
continued destroying Alied troops
December 1941: My version of Pearl Harbour
etc.
June 1939: Began positioning subs to blockade England's colonies, and transports also set off for India and Burma
August 1939: Joined Axis
September 1939: Germany Invades Poland
October 1939: Began unloading troops in the British Isles and India
Much fighting
March 1941: Invaded Australia
continued destroying Alied troops
December 1941: My version of Pearl Harbour
etc.