massive troops (easy to train) - germans
rifle - british
machine gun - american inventor, germans
barb wire - american inventor, germans
food preservation
telephone - alexaner graham bell
airplane
air warfare (propeller synchronizer) - fokker
tanks
gas
goodbye cavalry!
rifle - british
machine gun - american inventor, germans
barb wire - american inventor, germans
food preservation
telephone - alexaner graham bell
airplane
air warfare (propeller synchronizer) - fokker
tanks
gas
goodbye cavalry!
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