After receiving training at the Officers' Training School in Camp Upton, NY, Williamson received assignment to Company M with the 308th Infantry of the 77th Division.
Mauthausen-Gusen concentration camp | Auschwitz concentration camp | Dachau concentration camp | Upton Sinclair | Bergen-Belsen concentration camp | aide-de-camp | Guantanamo Bay detention camp | Sachsenhausen concentration camp | Ravensbrück concentration camp | summer camp | Buchenwald concentration camp | Camp David | Stutthof concentration camp | camp | Jasenovac concentration camp | Grini concentration camp | Upton Park | Theresienstadt concentration camp | Camp | Aide-de-camp | Upton | Marine Corps Base Camp Lejeune | Camp Nou | Camp Jackson | training camp | Flossenbürg concentration camp | Camp Rock | Aide-de-Camp | Walter Camp | Neuengamme concentration camp |
During World War I, Hammond was commissioned as a Major in the Medical Reserve Corps of the United States Army and stationed at Camp Mills and Camp Upton.