COLLEVILLE-SUR-MER, France — For decades, he was known only as Unknown X-9352 at a World War II American cemetery in Belgium where he was interred.

On Tuesday, Julius Heinrich Otto “Henry” Pieper, his identity recovered, was laid to rest beside his twin brother in Normandy, 74 years after the two Navy men died together when their ship shattered while trying to reach the blood-soaked D-Day beaches.

Six Navy officers in crisp white uniforms carried the flag-draped metal coffin bearing the remains of Julius to its final resting place, at the side of Ludwig Julius Wilhelm “Louie” Pieper at the Normandy American Cemetery and Memorial.

The two 19-year-olds from Esmond, South Dakota, died together on June 19, 1944, when their huge flat-bottom ship hit an underwater mine as it tried to approach Utah Beach, 13 days after the D-Day landings.

While Louie’s body was soon found, identified and laid to rest, his brother’s remains were only recovered in 1961 by French salvage divers and not identified until 2017.

A lone bugler played taps as the casket was lowered in an end-of-day military ceremony attended by a half-dozen family members, closing a circle of loss. Each laid a red rose on the casket and two scattered American soil over it.

The Pieper twins, both radiomen second class, are the 45th pair of brothers at the cemetery, three of them memorialized on the Walls of the Missing at the cemetery. But the Piepers are the only set of twins among the more than 9,380 graves, according to the American Battle Monuments Commission.

The cemetery, an immaculate field of crosses and Stars of David, overlooks the English Channel and Omaha Beach, the bloodiest of the Normandy landing beaches of Operation Overlord, the first step in breaching Hitler’s stranglehold on France and Europe.

“They are finally together again, side by side, where they should be,” said their niece, Susan Lawrence, 56, of Sacramento, California.

“They were always together. They were the best of friends,” Lawrence said. “Mom told me a story one time when one of the twins had gotten hurt on the job and the other twin had gotten hurt on the job, same day and almost the same time.”