Indeed in the US, I think they should be required to sign up for Selective Service just like men are.
That being said, I think they should be put in jobs where they have passed tests showing their capabilities (just like men). By-and-large, this means they won't be dragging cannons up hills. On the other hand, there are lots of guys who wouldn't be able to handle jobs liasing with local populations.
Yeah, statistically women bring different strenghts to the military than men do, but there is a lot of overlap and blanket statements about things that one gender can do that the other cannot are usually demonstrably wrong. This is why we do testing.
The more variety we have in our military, the better. That includes the strengths that women bring.