Billy Joe Ellis was living in Elizabethton, TN when he entered the service and was a member of Company D, 2nd Battalion, 12th Cavalry Regiment, 1st Cavalry Regiment. On January 3, 1969, he was on radio watch at landing zone Leslie, when incoming mortar rounds cause the nearby ammunition bunker to explode. He was listed as Missing in Action. His remains were never found. He is memorialized at Honolulu and has a memorialstone at Happy Valley Memorial Park, Elizabethton, Carter County, TN.
- Rank: Staff Sergeant
- Date of birth: 20 April 1948
- Date of death: 3 January 1968
- County: Carter
- Hometown: Elizabethton
- Service Branch: Army
- Division/Assignment: 12th Cavalry Regiment, 1st Cavalry Division
- Conflict: Vietnam
- Burial/Memorial Location: Honolulu Memorial, Honolulu, Hawaii
- Location In Memorial: Pillar XXII, Middle Panel
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