The fact is that the most exceptional female soldier would probably be comparable to the average male soldier. Females are 'not' built for physical strength or fighting, that's a biological fact.
In the modern age with weapons that can fire across great distances, and require only that you know how to aim and pull the trigger along with the proper maintenance procedures, it's made at least somewhat possible (not ideal or practical, but possible) for women to participate in war, as such weapons do not require you to clash with the physical strength for fighting prowess of an opponent, just that you know how to aim, change position, and take cover. However, before the invention of automatic rifles, it really showed just how inferior women were in combat. If a trained female soldier with a sword, charged a trained male soldier with a sword, she would get bisected in two seconds.