The term “bear arms” is an idiom that means to serve as a soldier, do military service, fight. To “bear arms against” means “to be engaged in hostilities with.” The word “arms” itself has an overwhelmingly military meaning, referring to weapons of offense or armor of defense. In every instance we have found where the term “bear arms” (or “bearing arms” or “bear arms against”) is employed, without any additional modifying language attached, the term unquestionably is used in its idiomatic military sense. It is only where additional language is tacked on, either to bend the idiom by specifying a particular type of fighting or to break the idiom by adding incompatible language, that the meaning of “bear arms” deviates. In the Second Amendment, the term is employed in its natural, unadorned state and, therefore, one must conclude, was used idiomatically to refer to military service.