I think our society is deeply in error where it tries to treat men and woman as interchangeable, and to deny the essential, fundamental differences between them.
The idea of women being subject to the same obligation as men with regard to military service, and the idea of women serving in combat, is surely one of the most blatant areas in which this error can be seen.
It is the natural role and duty of men to protect women, and to fight violently, where necessary, to do so. This is programmed into us by instinct. Similarly, wherever else the use of violence is called for, this falls under the natural role and duty of men, and not of women. To hold that women should bear the same obligation as men in this regard, is to deny the basic natural differences between men and women.
In a practical sense, if you put men and women in a situation where they are fighting side by side against a common enemy, it is going to be the natural instinct of every real man who is of any value as a man, to protect the women around him at the expense of the cause for which he is supposed to be fighting. Aside form the obvious reduction in effectiveness as a military force, one has to consider the implications of training men and women for this situation, to override their natural instincts, when they are later returned to civilian society. What can be the impact, in a civilian society, of men who have been trained to override their natural instinct to protect women? What of women who have been trained to engage in violence outside of their inherent nature? Neither of these is going to be good for the society into which these former soldiers are returned.
I would very much prefer that women not be in the military at all, and where they are in the military, that they be kept as far as possible from actual combat.