He was in the United States Army from 1917 to 1922 during the World War I era, where he was a captain in the infantry.
[1] He continued in the Judge Advocate General's Corps, United States Army and was stationed at Camp Gordon, Georgia, becoming a major.
He served in the Georgia National Guard from 1927 to 1931 and was appointed as the state adjutant general.
[2] Parker was elected as a Democrat to the Seventy-second Congress to fill the vacancy caused by the death of United States Representative Charles G. Edwards.
This article incorporates public domain material from the Biographical Directory of the United States Congress