Naval Mobile Construction Battalion NINE (MCB-9), known as the "Fighting Ninth," was a distinguished unit of the United States Navy Seabees. Commissioned during World War II in 1942, MCB-9 played a vital role in constructing airfields, bases, and other infrastructure throughout the Pacific Theater, supporting major operations in locations such as the Solomon Islands and the Philippines. After World War II, the battalion was decommissioned but later reactivated, serving with distinction in conflicts including the Korean and Vietnam Wars, where they built and maintained critical military facilities. MCB-9 continued to serve in peacetime construction and humanitarian missions until its final decommissioning in 1994.
