WASHINGTON (AP) — The remains of a missing World War II soldier from Oregon have been identified and will be returned to the state for burial, federal authorities announced Thursday.

The remains of US soldier William Calkins have been identified after they were exhumed along with other unknown soldiers buried at the Manila American Cemetery in the Philippines, the Department of Defense said in a statement issued by Oregon Public Broadcasting.

The department’s Defense POW/MIA Accounting Agency, which is tasked with recovering prisoners of war and missing soldiers, said Calkins was captured after U.S. troops surrendered to Japanese forces in Bataan province. After completing the gruesome 105-kilometer (65-mile) Death March of BataanHe was held in the Cabanatuan No. 1 prisoner of war camp, where, according to records, he died on November 1, 1942, at the age of 20. He was buried with other prisoners in the so-called mass grave 704.

After the war, his remains were exhumed from the camp and transferred to the Philippine capital, where they were buried as “unknowns” at the Manila American Cemetery and Memorial, the agency said. Their identities remained unknown until this year.

In 2018, the agency re-exhumed the unknown remains from Grave 704 and sent them to a lab for identification. There, scientists used DNA analysis and other techniques to identify Calkins’ remains.

A rosette will be placed next to his name on the Wall of the Missing at the Manila American Cemetery to indicate that he has been found, the agency said.

Calkins’ remains are scheduled to be returned to Oregon in September and buried in the Portland suburb of Hillsboro.