What We Do The 91st Brigade Engineer Battalion consists of seven companies that all provide unique capabilities to the Brigade. Here, you will find what each does on a day to day basis. Mission: On order, Saber BN conducts mobility, counter-mobility, survivability, military intelligence, surveillance & reconnaissance, and signal operations ISO IRONHORSE Brigade. 91stbeb Welcome Sabers! Privacy Policy Menu Privacy Policy Copyright 2020 91stbeb.com.All rights reserved.