trench 0/1/0 2HP, repair, AA, only one can be placed per territory/per turn, no factory requirement. 3Pu
infantry 1/2/1, AA, artillert supportable 3Pu
artillery 2/2/1, AA, +1 attack bonus to infantries. 4Pu
armour 3/3/2, AA, can blitz. 5Pu
No Tech.
Sub should be more cost effective at sinking ships than fighters because fighters are alredy very versatile units. There would be no reason to buy them if they had the same cost with fighters.
Submarine was 25% cheaper than destroyer in AA50 whereas in here they are 33% cheaper, just slighly more cost effective.
Carrier has 1 HP.