For 10 points, name this first major American labor organization whose influence declined after the Haymarket Square bombing.
The hymn "Hold the Fort" was a popular tune of this organization. Members of this organization were responsible for the Rock Springs Massacre, which resulted in the deaths of dozens of Chinese miners. It achieved its greatest influence under Terrence Powderly, and its founder Uriah Stephens emphasized secret rituals. For 10 points, name this first major American labor organization whose influence declined after the Haymarket Square bombing.
The hymn "Hold the Fort" was a popular tune of this organization.
Noble Order of the {Knights} of {Labor} [or {KoL}]