Gadianton Robbers See also Secret Combinations In the Book of Mormon, a band of robbers founded by a wicked Nephite named Gadianton. Their organization was based on secrecy and satanic oaths. Gadianton caused the destruction of the Nephite nation, Hel. 2:12–13. The devil gave secret oaths and covenants to Gadianton, Hel. 6:16–32. Secret combinations caused the destruction of the Jaredite nation, Ether 8:15–26.