The Thirteen Arms (Los Trece Brazos) are an important adventuring group of the generation preceding the Regulators.
Benetton, the literate paladin who later joined the Regulators’ core in the frozen north of Labrador, comes from the group. The armor he carries is inherited from that old band, and the letters he writes to his mare Caro Cuore began, it is said, on a campsite night of the Thirteen Arms.