Age of Strategy Forums

Germany has Panzerjager and Panzergrenadier that can be taken as unique infantries, so I think other nations could get unique infantries too.
American: Seabees: Upgrade of the premium engineer. Now can defend themself like normal rifleman.
Rangers: Walks the same in all terrain. Infantry grenade and at grenade
Russians: Shock Troops: Upgrade smg infantry of Russian. Now have rpg 40 at grenade like other nation's plus 1 extra action (Soviets like to supply ppsh to most late war infantries). The one extra action is just bonus for waiting without at grenade.
Japanese: Banzai Charge: 2 cost low hp. Speed of 4. Have "mowed down" effect that works like leaving in aos mercenaries. Great damage and at grenade. Useful only in desperation.
Japanese SMG: They don't have infantry grenade, instead will be replaced with type 89 mortar ability. 2 range, but slightly weaker than other nation's infantry grenade. At grenade still exist.
British: Commando: Start with paratrooper plane. Stealth in infantry form. Have sabotage ability to applicable to factory buildings. Sabotage will disable the building making it unable to produce things for some turns.

I am not good in balancing. Just give your opinion

Maybe since anything with leaving might be annoying. The banzai can just have lower hp to keep it look fraglie

These are all good ideas

In case banzai is just weird, bicycle infantry: Japanese likes their folded bicycle. Moves 4 speed. Good for rushing.