Manpower recovery

[Cowsnipe]

You'd be 9 at the time Berlin fell. Somehow I don't think the few 9-year-olds who might have participated in the doomed defense of Berlin had enough of an impact to justify making a whole mechanic for how they're added to the population.

They Japanese handed out shivs to kids in preparation of the mainland invasion.

You are right tough, they shouldn't waste time modeling pop growth when the game has such a short timeframe, modders can always script it if someone cares for it.