Appointed 2LT, 2nd Infantry federally recognized on 3 Aug 1898 and fought with L Company 2nd Infantry Regiment in Cuba in 1898 and 1899. He was promoted to 1LT on 16 May 1899 in Cuba. The 2nd returned to the U.S. in September 1899. The 2nd Infantry was deployed to the Philippines in August 1900. While in the islands the regiment fought in more than 25 engagements on several of the archipelago's islands. 1LT Harris returned with M Company to the western U.S. in May 1903. Archie was promoted to CPT on 30 Dec 1904 . He graduated from the Infantry and Cavalry School in 1905 then deployed with the regiment to the Philippines in May 1906. He served there posted to the Agur barracks and H Company until the regiment returned to the U.S. in March 1908. CPT Harris assumed duties as Regiment Adjutant on 1 Jun 1908 and on 7 Oct 1908 at Fort Thomas, Kentucky he married Helen J. Price.
The regiment remained at Fort Thomas until it was deployed to Hawaii in 1911. When WWI broke out the 2nd had the duty of guarding interned German ships and crews in Hawaii as well as various installations. Archie was promoted to MAJ on 15 May 1917. He was then assigned to the 362nd Infantry Regiment, 91st Division at Camp Lewis, Washington (now Fort Lewis) and in September 1917 transferred from the 362nd to 346th Infantry Regiment in the 87th Division.
MAJ Harris was permanently promoted to LTC on 1 Jul 1920 and LTC Harris was apparently sent to France where he received a temporary promotion to COL effective 2 Jul 1918 and on 21 Aug 1918 assumed command of 116th Infantry Regiment which he commanded in the opening days of the Meuse-Argonne offensive. COL Harris was relieved of command on 9 Oct 1918 but kept his temporary rank until October 1919. COL Harris returned to the U.S. in June 1919 first going to Fort Dix, New Jersey. He was promoted to COL on 20 Jul 1920 which was made permanent on 1 Dec 1920. COL Archie Harris assumed duties as E&R officer of Fort Lewis, Washington. He was retired effective 22 Dec 1920.
After he retired and he and Helen moved to 1628 Bushnell Avenue, Pasadena, California a home valued at $4000 in 1940 and $2.4-million today. They apparently left a very quiet life. The couple had no children.
COL Harris died on 19 Feb 1953 in Pasadena, California of a heart attack while doing yard work. He was interred in Grandview Cemetery in Fort Collins, Colorado.
NOTE: This memorial was published 50-years after his death.