I think my original point still stands even if you were correct because I am arguing the biological basis for many behaviors. However you’re missing the basic

I think my original point still stands even if you were correct because I am arguing the biological basis for many behaviors. However you’re missing the basic concept that the country that used both women and men could simply create a larger army and crush the other country. The reason this did not work historically was more to do with men’s larger size and muscle mass than reproductive issues. If you can fire an arrow and extra 20 feet you can kill someone before they can attack back. If can lift a heaver weapon with a longer range you are far more likely to win in melee combat. Such minor advantages are far less important in gathering food so sending a largely male army off to combat is simply more efficient prior to the use of fire arms. (There is some evidence that women do better in modern firefights so you could see a reversal of this trend fairly soon.) PS: Population sizes are far closer linked to the ability to gather food and avoid disease than the ability to reproduce. In theory more women = more baby’s but you could also see 4x population growth in 30 years which does not happen.