Poindexter also served as United States Ambassador to Peru during the presidential administrations of Warren Harding and Calvin Coolidge.

[1] His parents were residents of Malvern Hill in Henrico County, Virginia, and his father was an American Civil War veteran of the Confederate States Army.

[5] During World War I, Poindexter moved away from supporting progressive causes and led several efforts that questioned the patriotism of German-Americans and attempted to keep them from wartime leadership positions in the military.

Reichmann had become a US citizen in 1887 and the promotion was supported by American Expeditionary Forces commander John J. Pershing, Hugh L. Scott, the Army Chief of Staff, and Newton D. Baker, the Secretary of War, but they were unable to overcome Poindexter's opposition and Reichmann remained a colonel.

[7] Poindexter was a target of reformers and progressives in 1922, and lost his bid for reelection to the Democratic nominee, Representative Clarence Dill.

[8] After he lost his 1922 campaign for reelection to the Senate, in 1923 Harding appointed Poindexter as United States Ambassador to Peru.

[4] After the death of his first wife, Poindexter returned to his home, "Elk Cliff" in Greenlee, near Natural Bridge Station, Virginia.