Born in San Francisco, California, May 5, 1896
Attended the Lowell High School, San Francisco, 1912-1913 Enrolled in the University Farm School, Davis, September 1912
Charter Member Calpha Club 1912
On Editorial Staff ‘FARM AGRICOLA’, 1913
Graduated June 1915

Military Service

MILITARY HISTORY
World War I S/N (not stated)

Military Training

Enlisted 31 May 1917 as Private in the Aviation Section, Signal, Group, Enlisted Reserve Corps. Entered on active duty, School of Military Aeronautics, Berkeley, California.
Completed Training Program 8 March 1918 and honorably discharged.

COMMISSIONED First Lieutenant, Aviation Section, Signal Group, Officer Reserve Corps and entered on active duty 9 March 1918.

Active Service Assignments

May 1918; assigned to overseas service and attached to the British Expeditionary Forces, Air Service in France.
In Service 11 months and 19 days.

Lieutenant Hammer was killed in action on May 19, 1918, over Picardy, France.

Decorations and Awards

PURPLE HEART (Posthumous).
WORLD WAR I VICTORY MEDAL, with Clasp for France.

Interment

* Vielers, Bretouneaux, Somme.
* ‘A German plane flew over the American lines and released a printed message stating that the young American flyer who had fought so bravely and had been shot down over the German lines had been buried with military honors'