Sergeant First Class Robert Lee Jennings was born on October 30, 1930 in Scott County, Tennessee. He was the son of John William Jennings and Eva Lee McDavid Jennings. He had two older brothers, Kenneth William Jennings and Clarence Jennings, three younger brothers, Lem Demsy Jennings, Junior Jennings, and Roy Jennings, and one younger sister, Ruby Jennings, who died in infancy.
Sergeant Jennings served as a Light Weapons Assault Crewman or Light Weapons Infantry Leader with the 15th Infantry Regiment, 3rd Infantry Division. He was killed in action while fighting the enemy in North Korea on June 4, 1951. He is buried in Mountain View Cemetery in Lake City, Anderson County, Tennessee.