The mission of the Office of Naval Research (ONR) is to maintain a close relationship with the research and development community and the operational community to support long-range research, foster discovery, nurture future generations of researchers, produce new technologies that meet known naval requirements, and provide innovations in fields relevant to the future Navy and Marine Corps. Accordingly, ONR supports research activities across a broad range of scientific and engineering disci- plines. As one means of ensuring that its investments appropriately address naval priorities and require- ments and that its programs are of high scientific and technical quality, ONR requires each of its departments to undergo an annual review, with a detailed focus on about one-third of the reviewed department’s programs. Since 1999, the Naval Expeditionary Warfare Department (Code 35) of ONR has requested that the Naval Studies Board (NSB) of the National Research Council (NRC) conduct these reviews for its constituent divisions. The first review of ONR’s Marine Corps Science and Tech- nology (MCS&T) program was conducted in 2000.1