When I first joined the Army in 1990, there were no women at all in infantry units. I only remember seeing them around the brigade headquarters in the late 90s. But since 2001, I have served with, led, and been led by women.
Benjamin Franklin nailed it when he said, "Fatigue is the best pillow." True story, Benny. There's nothing like pushing your body so far past exhaustion that you'd willingly, even longingly, take a nap on a concrete slab.