The comment made before was completely on the right lines. The simple fact is women will never possess many of the attributes required to fight in the infantry. Strength and physical robustness will mean that this will never happen. Also tests that have been done by England show that a female tone of voice (ie. one that is comparable to an 11 year old boy's in tone) cannot command any type of tactical authority, whilst for example it has been shown also that if a man were to see a women badly injured in battle, then he is more likely to stop to help her rather than carry on until he can safely admin help. Also the fact is that infantry living in close proximity of each other - tacticaly and non-tactically - means that women can never be allowed to join.
I'll be the first to admit that this is quite clearly a Brit viewpoint but im sure it will be held. Also the fact is that we have the best army in the world and we are not going to jeopoardise this by allowing an inlet of inferior quality soldiers for political reasons (I must appologise for that comment so early on but it would have come out of me sooner or later and that is simply my view anyway).
For example: You're the enemy dug in and suddenly the allied troops perform a bayonet charge on you. Out of the smoke you see a lady screaming at you with a bayonet - same effect? No.