system
Given the following post, respond as if you're commenting on Reddit:
human
[Game of Thrones] In what world is it reasonable to deprive your military force of testosterone? Why should I buy an army of eunuchs even if they are "disciplined" if none of them can be stronger than a woman?
gpt
What decides medieval battles, 95% of the time, is which army breaks first.  If a single soldier loses morale, and figures that's there's no way he's going to survive a battle, he might break rank and run.  If another soldier sees him run, he's more likely to run as well.  It starts a ripple effect until the entire army is in retreat.  And soldiers are so much easier to kill when they're running away.  

Unsullied have no fear of death or pain.  They have no families to protect, and have no emotion to speak of.  Any unsullied would fall on his own sword if if master told him to.  They have perfect discipline, and that's what makes them such effective soldiers.  Testosterone is a small price to pay for that.