In Alma 49:20 we find that the Nephites "were prepared, yea, [with] a body of their strongest men, with their swords and their slings, to smite down all who should attempt to come into their place of security by the place of entrance." According to the report "Defensive Earthworks at Becan, Campeche, Mexico, Implications for Maya Warfare" by David L. Webster: "Even if there was not time enough to shut off the causeways, they could have been held successfully by a few seasoned warriors, protected on flanks and rear." [Michael and June Hobby, Proofs of the Book of Mormon, p. 40]