well. women are physically built differently than men. women are PHYSICALLY and NATURALLY weaker and softer than men. so that is why men are drafted first- due to "capability" reasons. and also because women bare children and have to carry them for 9 months and that isn't safe if a woman gets drafted.
No. Because women reproduce. That's not saying women shouldn't be allowed to go to war, but a woman's main purpose is to bare children. And she cannot do that if she is fighting in a war.
Yes. They are just as physically capable as men. And aptitude tests show that women are better than men at piloting. And if they aren't, that would just be plain sexist.