About US Marshals Posse Our Promise Publicize and promote goodwill on behalf of the US Marshals Service Promote good fellowship among members through participation in civic events Promote good horsemanship among members, and the public Publicize activities of the US Marshals Service, calling favorable attention to said service Keeping the US Marshals old west history alive for future generations. Visit District of Arizona Page Historical Timeline Make Donation Request Membership Info Apply for Membership