> Historically countries didn't let women fight in wars because they didn't want their civilisation to die out.

Really? Might is also have something to do with women having trouble moving 80-100 lbs of gear like in WW2? It was 50 lbs in the Civil War. Do you think the leaders at the time had the foresight to keep women out of the war for future breeding purposes?

That's thinking 15-20 years into the future while they are fighting wars now.