During the Galactic Civil War, members of the Death Watch—a radical and violent Mandalorian splinter group led by Overlord Teti Viba—excavated a vast network of alum mines located beneath their bunker on the forest moon of Endor. Some time around 1.5 ABY, a group of spacers defeated the contingent of Death Watch soldiers at the base, and went on to use the group's alum supply to manufacture Mandalorian armor for themselves.