Sergeant Daniel Jackson McMahan was born on July 14, 1949, and was originally from Cleveland, Ohio. He served his country in the Vietnam War in the United States Army, as an infantryman in B Company, 1st Battalion, 503rd Infantry, 173rd Airborne Brigade. His tour in Vietnam began on April 7, 1970. Two months later, on June 9, 1970, Sgt. McMahan was killed under hostile conditions in Binh Dinh province, South Vietnam; he was 20 years old at the time of his death. Sgt. McMahan is buried at Union Cemetery in Newport, Tennessee, and is memorialized on the Vietnam Veterans Memorial on Panel 9W, Line 35.
- Rank: Sergeant
- Date of birth: 14 July 1949
- Date of death: 9 June 1970
- County: Cocke
- Hometown: Cleveland, Oh
- Service Branch: Army
- Division/Assignment: 173rd Airborne Brigade
- Conflict: Vietnam
- Awards: Silver Star, Bronze Star with Oak Leaf Cluster, Purple Heart
- Burial/Memorial Location: Union Cemetery, Newport, Cocke County, TN
- Location In Memorial: Pillar XXII, Middle Panel
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