But deeper analysis of the Heller case suggests this interpretation may be too quick. Heller was itself interpreting a 1939 decision, U.S. v. Miller. The court then analyzed the Second Amendment's explanation that the purpose of the amendment was related to the need for a "well-regulated militia." In an opinion by Justice James McReynolds, a libertarian generally agreed to be the nastiest justice ever, the court said that "ordinarily when called for service," militiamen "were expected to appear bearing arms supplied by themselves and of the kind in common use at the time."