>>43378251>>43378296Firstly, let's sort out a math/genetics point here: assuming the breeder/fighter split in the women is 50/50, we're only dealing with 1/3 of the group being unable to breed if at least 2/3 children born are female.
Assuming more normative numbers, it's 1/4 who aren't breeding.
However, this leads to a genetics problem. See, a modern nation needs every woman producing 2.1 children to maintain population. Let's super-simplify, and assume that number is magically constant (it's not, it would have been a lot higher in the ancient era).
If 50% of women aren't breeding, that means the remaining half have to "double production". So each breeder woman would have to produce 4.2 children.
Except, in that case, breeders are being selected FOR, making it less likely that warriors will be born...
Leading to the following answer: Have the castes be socially or magically enforced, and preferably reversible. This allows skilled warrior women to retire, and have children, thus allowing their genes to rejoin the pool.
>>43378361Actually, depending on how you handled it, this group might have MORE soldiers, assuming at least some portion of men are allowed to fight as well.
If half of all women and all men are allowed to fight, that's 66% of the population. (Assuming the 2 to 1 number) That's more than the standard 49% male population available to the other tribe. Meaning that up to half of all males could be non-combatants, before the numbers became closer to equal.
Now, off hand, I would handle this with something akin to what
>>43378131 suggests.
Men would serve as builders, engineers, and home defense. The breeders would presumably form a priest/political caste, while the warriors would be another caste.
So in aggressive encounters, you'd normally only see the women soldiers, with Male siege engine support, and like, elite bodyguard units. But when assaulting the cities of the race, you'd be fighting the warriors AND the men.