Private First Class Daniel Gavrin, declared missing in 1944, was laid to rest at Arlington National Cemetery in a Jewish ceremony.
Gavrin was given full military honors on Friday, and a flag was handed to his nephew, David Rogers.
Gavrin was part of an invasion force in Saipan, then occupied by Japan, in June 1944. Japanese forces subjected the forces to banzai, or suicide, attacks, and killed and injured over 900 US soldiers.
Gavrin, 29, was reported missing on July 7 and declared presumed dead a year later.
A Japanese NGO last year uncovered remains in Saipan, now a US territory, in an unmarked burial site.
Gavrin’s DNA matched Rogers, his nephew, now 82, who last saw Gavrin, his mother’s brother, just before Gavrin enlisted.