I think a good idea for 1914 would be to require at least 1 infantry to be stationed in every territory by the end of a power’s turn (the infantry must be from the power controlling. If they don’t, they won’t get the IPCs from this territory. Not only does it potentially make the game more historically accurate (to symbolize the need to keep civilian populations under control during wartime), but it probably also makes the game more balanced, as the Allies will probably be more burdened with this (since they have substantially larger colonial possessions).
Corvette
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I originally designed this unit independent of any other source in the 1980’s when there was only A&A Classic available.
Corvette: move 2 (or 3*) Attack value = 1 and Defence value = 1. Cost is 6 PF.
(* For my A&A variant game & map I give Naval Units a move of 3)
(** I added the Corvette to compliment the original naval units of BB: Att 4 Def 4 +24 PF, Cr: Att 3 Def 3 +18PF & DD: Att 2 Def 2 +12 PF & the CV being Att 2 Def 2 +18 PF plus may carry 2 Fighters OR 1 Bomber)