How does the Chaplain show bravery at the end of chapter 19?

An argument arises when the chaplain asks for the atheists to be excused and to include the enlisted men with the officers. Colonel Cathcart becomes infuriated and begins to think that the chaplain is plotting against him and about the treachery of enlisted men. At last, when the chaplain points out the exclusion of the enlisted men might result in a looser bomb formation, the colonel gives up. Before he leaves, the chaplain mentions to Cathcart the wrongful increase of the number of missions to sixty--and Yossarian's bad health condition.