Welcome to Naval Mobile Construction Battalion (NMCB) 18! We are excited that we have this means to tell you a little bit about the "Northwest Battalion" and the people that make it great. In this site you will get a good understanding of NCMB-18's geographic area and our accomplishments. For a reserve battalion, that is the area upon which we draw people to fill our mobilization billets. For NCMB-18, that area covers seven states, either in whole or in part, of the northwest, including Alaska.