Such medical and chaplain personnel are required to be marked (which explains all the markings on TV shows such as M.A.S.H.). Otherwise how can a military opera

Such medical and chaplain personnel are required to be marked (which explains all the markings on TV shows such as M.A.S.H.). Otherwise how can a military operation avoid accidentally targeting them? If it's true that distinctively marked medical personnel were deliberately targeted then you're right that it would be a breach of the law of war.