Clinicians in Catholic health care institutions cannot prescribe contraceptives for pregnancy prevention under a false diagnosis without committing fraud and contravening doctrine. Referrals are one option the authors consider for navigating patient requests for contraception.
AMA J Ethics. 2018;20(7):E630-636. doi:
10.1001/amajethics.2018.630.
There is no morally compelling reason to distinguish a doctor from a tank driver on the battlefield except for the fact that both sides agree to protect medical personnel.