Earlier quoted context omitted.
> Historically countries didn't let women fight in wars because they didn't want their civilisation to die out. If a country loses a double-digit percent of its men it can still repopulate just as quickly, because one man can make multiple women pregnant, while if it loses its women then it takes significantly longer to repopulate, because one woman can't have multiple babies at the same time so the birthrate will ne…
> there were no laws or campaigns to allow harems or one man - multiple women combinations. You don't need laws or campaigns, it happens naturally, due to the increased sexual selection availability. And of course, given that, why would men opt of harems (especially where they aren't even historically relevant to their culture)? They'd just have relationships on the side, jump ship and marry again, etc.
Again, do you have any examples of this actually happening in the real world? It naturally happens that men become more desirable because there's less of them, but is there any actual case where it became widespread for men to get multiple different women pregnant to repopulate the country?
Not to mention, even if it did happen (and again, nobody has come up with any examples in the tens of times I've asked this question, and Google hasn't been helpful either), unless there was a concentrated government policy to that effect, you'd be mistaking correlation with causation - less men than women, so men are more desirable and can pull off multiple kids from multiple women doesn't mean that's the reasoning why only men were drafted.