US. NAVY SEABEEs during the Vietnam War:
Seebee's group shot.
During WWII they served in both the Naval Combat Demolition Units (CDU), and the Underwater Demolition Teams (UDTs). The UDT is now pretty much thought of their affiliation the the Navy's SEAL Teams. And the two often getting the recognition, but they need a home base to work out of, the Sea-bee's built it. The Seabees were a very needed part of the Navy's Operation and in no small way.