Retired Army Lt. Col. Willard L. Jones Sr., 74, a military historian who had served in the infantry in World War II and the Korean conflict, died of pneumonia Sunday at the Veterans Administration Hospital here. He lived in Silver Spring.

Col. Jones' last assignment, from 1953 until his retirement on disability in 1958, was with the Army's Office of Military History here.

He was born in Pelzer, S.C., and graduated from Presbyterian College in Clinton, S.C., in 1928. He earned a degree in library science from Columbia University in 1932 and then returned to Presbyterian, where he was the librarian until entering the Army as an infantry officer in 1941.

During World War II, Col. Jones served in North Africa and Europe. During the Korean conflict, he was stationed in Japan and Korea.

He was active in the Civil War Round Table of D.C. and was a charter member of the American Revolution Round Table of Washington.

Survivors include his wife, Alice, of Silver Spring; two sons, Willard L. Jr., of Indian Head, Md., and Army Sgt. Edwin T., of St. Louis, Mo.; two daughters, Sara Darnley and Elizabeth Parashis, both of San Jose, Calif., and eight grandchildren.