Montana State Arsenal, Armory, and Drill Hall - Helena MT In 1885, the Montana Territorial Legislature authorized the organization of a National Guard. Within three years its nine companies were headquartered in the territorial capital at Helena. Since that time Montana Guard personnel have been called up for State Active Duty to assist with riots, strikes, natural disasters, law enforcement, search and rescue, and other emergencies. Montana citizen soldiers mustered into federal service for military actions including the Spanish American War in 1898, the Philippine Insurrection in 1899, World War I France, throughout World War II's Pacific Theatre, the Korean and Vietnam conflicts, the Persian Gulf War, Bosnia and Kuwait,...