United States v. Miller, 307 U.S. 174 (1939)
Two funny things about this case:
1.) It ruled that military-style weapons are definitely protected by the 2nd amendment. But the government has spent vast amounts of time trying to restrict or ban exactly those kinds of weapons (so-called "assault weapons") for years, in direct violation of the US v. Miller ruling... and are still trying today!
2.) When US v. Miller was heard by the Supreme Court,
no one showed up for the defense. Miller didn't show up, his lawyer didn't show up, nobody wrote any "Friends of the court" briefings or anything else for Miller's side. (Miller was found dead in a stream bed a few weeks later, with four pistol bullets in his chest). Only the government prosecutors showed up. The other side of the Courtroom was
completely empty.
The prosecutors took advantage of this huge windfall, and read several flat lies into the record ( a. The 2nd protects only military-style weapons, b. Miller's short-barreled shotgun was not similar to a military weapon, c. The 2nd only protected members of the military or militia etc.). Since nobody was there to refute them, the Justices rubber-stamped these lies into an Opinion that ruled against the absent Miller.
US v. Miller was one of the most complete miscarriages of justice ever seen in the history of the U.S.
In case you were wondering why the government has been so careful to NEVER re-examine the Miller case, now you know. If the Miller case were ever brought up for re-examination, with both sides present this time, it would be overturned in five minutes. And all the court rulings that used it as a basis, would quickly fall like dominos... and that's nearly all of the "gun control" cases.