This is a prophecy against the Gadianton robbers that are rampant in Moroni’s day (4 Nephi 1:46). Moroni has before him the record of the Jaredites whose secret combinations eventually destroyed them, and he is using that past example as the basis for his future prophecy against the Gadiantons, who are the secret combination of his own day. In the historical correlation we are using in this commentary, the Gadiantons were seen as the influence and presence of Teotihuacan. Indeed, that city was influential for hundreds of years, but eventually fell, and was destroyed. Moroni’s prophecy did see its fulfillment around 600 AD.