The 9th Infantry Division ("Old Reliables") is an inactive infantry division of the United States Army. It was created as the 9th Division during World War I, but never deployed overseas. In later years, it would become an important unit of the U.S. Army during World War II and the Vietnam War. It was also activated as a peacetime readiness unit from 1947 to 1962 at Fort Dix, New Jersey, and Fort Carson, Colorado, and from 1972 to 1991 as an active-duty infantry division at Fort Lewis, Washington. Nicknamed the "Old Reliables", the division was eventually deactivated in December 1991. Insignia The shoulder sleeve insignia is an octofoil resembling a heraldic design given to the ninth son of a family. This represents the son as a circle in the middle with eight brothers around him. The blue represents the infantry, the red the artillery with all the white making the colors of the flag of the United States of America. World War I The 9th Infantry Division was created on 18 July 1918 at Camp Sheridan, Alabama but did not serve overseas. Its units included Division Headquarters; the 17th Infantry Brigade (Headquarters and Headquarters Company; 45th Infantry Regiment; 67th Infantry Regiment; 26th Machine Gun Battalion); the 18th Infantry Brigade (Headquarters and Headquarters Company; 46th Infantry Regiment; 68th Infantry Regiment; 27th Machine Gun Battalion), the 9th Field Artillery Brigade ( 25th Field Artillery (75mm Gun); 26th Field Artillery (75mm Gun); 27th Field Artillery (155mm Howitzer); Ninth Trench Mortar Battery); 25th Machine Gun Battalion; 209th Engineer Regiment; 209th Field Signal Battalion; Division Trains (HQ Train and Military Police Company; 9th Sanitary Train; 9th Motor Supply Train, and Ninth Ammunition Train). The division was commanded by Colonel Charles C. Clark (July 1918 - September 1918), Maj. Gen. Willard A. Holbrook (September 1918 - October 1918), Brig. Gen. James E. Ryan (October 1918 - November 1918) acting, Maj. Gen. Willard A. Holbrook (November 1918 - February 1919) Interwar period The 9th Division was demobilized at Camp Sheridan, Alabama, on 15 February 1919. In 1921, because of funding cuts, the Army had decided to inactivate the 4th through 9th Divisions, except for one brigade and certain supporting elements of each division. When the 9th Division was reconstituted in the Regular Army on 24 March 1923, the 18th Infantry Brigade (5th and 13th Infantry Regiments) along with several other elements were assigned as active units; They