1879

1879 Mont. Laws 359, Offences against the Lives and Persons of Individuals, ch. 4, ยง 23.

Montana

If any person shall, by previous appointment or agreement, fight a duel with a rifle, shot-gun, pistol, bowie-knife, dirk, small-sword, back-sword, or other dangerous weapon, and in so doing shall kill his antagonist, or any person or persons, or shall inflict such wound as that the party or parties injured shall die thereof within one year thereafter, every such offender shall be deemed guilty of murder in the first degree, and, upon conviction thereof, shall be punished accordingly [death by hanging].
Dueling