Or sailors, marines, airmen, etc? Can they refuse some treatments, but not others? Could a female soldier be ordered to use contraception? I’m interested in the US military’s policy, but foreign military infor would be appreciated.
I was reading one of Stephen Ambrose’s books which touched upon this very thing.
A Waffen SS unit engaged and got their asses handed to them by an American unit and one of the German wounded was bleeding very badly and would need a transfusion very quickly if he was going to survive. The SS dude asked if the proffered blood had “any of that Dirty Jew in it” and when told there was no way to be sure, the SS dude refused the blood and bled to death shortly thereafter.
Hardcore to the end. 
Female servicemembers cannot be ordered to use contraception. It’s freely available and the services make it attractive, but no, they cannot be ordered. There are those members of particular faiths, like Catholicism, who do not use contraception as a matter of conscience. Ordering them to violate their religious beliefs by requiring them to use birth control is a violation of the servicemember’s freedom of religious expression.
There are also those women who cannot or choose not to use contraception for other reasons. As a matter of policy, the military sees no reason to upset that apple cart.
Robin