-The last US Navy man hanged for mutiny was Midshipman Philip Spencer in 1842. The son of Secretary of War John C. Spencer, he had schemed with 2 others to turn his ship to piracy.
-Stephen Decatur was killed by John Barron. Decature had served on an inquiry board which had suspended Barron. Barron was to be reinstated and Decature objected. They fought a duel and Decature was killed.
UCMJ article is 114
Article 114—Dueling
Text.
“Any person subject to this chapter who fights or promotes, or is concerned in or connives at fighting a duel, or who, having knowledge of a challenge sent or about to be sent, fails to report the fact promptly to the proper authority, shall be punished as a court-martial may direct.”