Here at LSOZI, we are going to take off every Wednesday for a look at the old steam/diesel navies of the 1833-1946 period and will profile a different ship (or unit) each week. These ships have a life, a tale all their own, which sometimes takes them to the strangest places.- Christopher Eger
Warship Wednesday, July 3, 2019: The Frogmen of Balikpapan
Here, on a special WW where we take a break from an actual warship, we see a group of young U.S. Navy Underwater demolition personnel of UDT-18 aboard the fast transport (converted destroyer) USS Kline (APD-120) watching as Army B-25 bombers of the 13th Bomber Command plaster the Operation OBOE 2 invasion beaches off Balikpapan, Borneo circa 3 July 1945– 74 years ago today. They are waiting for orders to leave their boat to clear underwater obstacles to go clear the beach to allow allied Australian troops to land. While the Pacific War would be over in less than two months, these frogmen, many of which are on their first mission, could not know that was looming and they had a Japanese-held beach to clear of obstacles.
According to Lt. JG C.F. Waterman, who took these amazing pictures, “Things looked rather bad at the moment and everyone was thoroughly scared.”
Originally formed in May 1943 as Naval Combat Demolition Units (NCDU), teams were created to clear beach obstacles in enemy-held areas. During the Torch Landings in North Africa, a group of Navy salvage personnel with a one-week crash course in demo hit the beaches but it was obvious that a more dedicated force would be needed. That led to LCDR Draper L. Kauffman’s efforts to train teams ready to go ashore to clear a path. By Normandy, 34 NCDU teams would land on D-Day, suffering 53 percent casualties. They would repeat their efforts in the Dragoon Landings in Southern France in August 1944.
Meanwhile, in the Pacific, nine dedicated Underwater Demolition Teams were formed, largely from Seabees with a smattering of Marines, to work across Japanese-held atolls. First hitting Kwajalein on 31 January 1944, the Pacific teams initially were dressed for land combat like many of the NCDU members in Europe, with uniforms, boots, M1 helmets, and small arms in addition to their demo charges.
This soon changed as men skipped down to their swim trunks and swam on night missions to map the beaches before the landings. This later morphed into standard gear.
Across Peleliu, the Philippines, Guam, and Iwo Jima, UDTs left their mark and went in first to guide the landing craft in and make a hole for them to hit the beach if needed.
By Okinawa, no less than eight full teams with 1,000 frogmen were utilized. There the nearly naked combat recon swimmers used aluminum paint (yikes!) to camouflage their skin against Japanese snipers– and to help insulate against the chilly Northern Pacific waters which could quickly lead to hypothermia.
Japanese Army type 93 anti-tank mine in the sand of Tinian Island. This mine was nicknamed a “tape measure” by UDT men due to its shape
The Balikpapan assault
Balikpapan would be the swan song of WWII frogmen ops with the final UDT demolition operation of the war on 3-4 July 1945, as the swimmers UDT-11 and UDT-18 removed their helmets and slid over the side of their landing craft before paddling to destiny in broad daylight.
Under the watchful eyes of Gen. MacArthur, whose flagship was just offshore, the frogmen, armed just with knives and demo charges, first mapped the beaches and then helped clear them, coming within range of Japanese mortars and small arms.
Balikpapan was to be no walkover, as the roughly 2,000 Japanese regulars there (augmented by 3,000 local Indonesian conscripts) defended the beaches well and, while they did not have Rommel’s Atlantikwall complete with Belgian Gates and Czech Hedgehogs, they did have thousands of punji stakes to impale infantry, mines, fougasse oil traps to burn men alive, wire obstacles, log barriers to hole landing craft, and the like.
The above frogman, William DeWolf Hopper Jr., served with the Navy as a volunteer with the Office of Strategic Services in addition to his UDT work. As a member of UDT 10, he participated in operations on Peleliu, Anguar Island, and the Occupation of Ulithi in addition to the Invasion of Leyte, earning a Bronze Star. Originally from New York, Hopper reluctantly returned to California after the war and went on to have a career in Hollywood in the late 1950s and 1960s.
Amazingly, the UDT teams at Balikpapan only suffered one, non-fatal, injury.
As for our frogmen, it was expected that if they would have hit the beaches at Honshu in late 1945, a mission they were detailed to until the A-bombs intervened, the men of UDT-18 would have suffered 100 percent casualties.
At the SEAL/UDT Museum in Fort Pierce, where NCDU’s and UDTs were formed and trained in WWII, they have a massive 7-foot long model of the old USS Kline on display and a statue of an era frogman dedicated to the “naked warriors” of Balikpapan and all the other beaches in which their brothers landed.
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