James Rudolph Gamble was in active service with the US Marine Corps Reserves. He was born on 16 January 1922 in Tennessee, son of Ethel Francis Gamble and Ella Mae Diggs. According to a 1940 census, he was still living in Harriman, TN.
He died on 21 January 1945 in Orange County, California. He is buried at Harriman Cemetery in Harriman, Roane County, TN.