He enlisted in the USAAF in Newark, New Jersey, on 12 December 1942. He was trained as an armorer (responsible for the maintenance of the weapons on the B-25) and as a gunner. He earned his crewman wings. He was sent through India to China about 24 February 1944. On 19 January 1945 a B-25H, # 43-4604, assigned to 14th Air Force, 341st Bomb Group, 491st Bomb Squadron, Yangkai, China, on Ha Trung, China. Witnesses to the crash of the B-25 were Capt. James L. Flanagan, 0-393441 and Sgt John C. Vivensio, 31007553. Sgt Vivensio reported that he saw the B-25 on a strafing run on target at 800’ when it rolled onto its back and crashed and exploded about 1 mile west of the target in Annam (Vietnam; French Indochina), near Duong Diao, French Indochina. Capt. Flanagan verified this and flew over the crash several times taking pictures. The crash coordinates were 20° 8’ North and 105° 50’ East. After recovery, his remains were buried in the Mount Olivet Cemetery, Newark, New Jersey.
His brother, Charles A. Siana, born 3 July 1909, served in the U.S. Army from 28 November 1942 to 10 October 1945. He died 16 September 2003 and is buried in the Saint Gertrudes Cemetery, Colonia, Middlesex Co., New Jersey.
His brother, Lawrence J. Siana, born 4 October 1915, served in the U.S. Navy, BM2ndC, # 9055300, LSM-481 (Landing Ship Medium tanks and infantry), LST-802 (Tank Landing Ship). He died 19 November 1997.
His brother, Edward J. Siana, born 6 November 1921, served in the U.S. Navy from 2 April 1942 to 9 November 1945. He died 14 November 1986 and is buried in the Saint Gertrudes Cemetery, Colonia, Middlesex Co., New Jersey.