later but most of Group A's gear was put into storage as it was not applicable to UDT work. The OSS was very restricted in operations in the Pacific. ADM Nimitz approved the transfer the five officers and 24 enlisted men of Maritime Unit Operational Swimmer Group A led by Lieutenant Choate. They became part of UDT 10 in July 1944. LT Choate would become commander of UDT 10. The rest of MU Group A would fill most of UDT 10's command offices as well as many of the swimmers. Five of the OSS-trained men participated in the very first UDT submarine operation with in the Caroline Islands during August 1944. Three of the men failed to make the rendezvous point for extraction. They were reported captured in Japanese communications and identified as "BAKUHATAI"explosive ordnance men. They were never seen again and are listed as MIAs. Underwater Demolition Teams (UDTs) The first units designated as Underwater Demolition Teams were formed in the Pacific Theater. Rear Admiral Kelly Turner, the Navy's top amphibious expert, ordered the formation of Underwater Demolition Teams in response to the failed invasion at Tarawa and the Marines' inability to clear the surrounding coral reefs with Landing Vehicle Tracked (LVTS). Turner recognized that amphibious operations required intelligence of underwater obstacles. The personnel for these teams were mostly local Seabees or others that had started out in the NCDUs. UDT training was at the Waipio Amphibious Operating Base, under V Amphibious Corps operational and administrative control. Most of the instructors and trainees were graduates of the Fort Pierce NCDU or Scouts and Raiders schools, Seabees, Marines, and Army soldiers. When Teams 1 and 2 were initially formed they were "provisional" with 180 men total. The first underwater demolition team commanders were CDR E.D. Brewster (CEC) UDT 1 and CDR John T. Koehler UDT 2. The teams wore fatigues with life-vests and were not expected to leave their boats – similar to the NCDUs. However, at Kwajalein Fort Pierce protocol was changed. Admiral Turner ordered daylight reconnaissance and CEC. ENS Lewis F. Luehrs and Seabee Chief William Acheson wore swim trunks under their fatigues anticipating they would not be able to get what the Admiral wanted by staying in the boat. They stripped down and spent 45 minutes in the water in broad daylight. When they got out they were taken directly to Admiral Turner's flagship to report, still