The 122nd Signal Battalion was constituted 1 July 1916 in the United States Regular Army, then organized to Fort Bliss in Texas on 10 October 1916. On 21 September 1917, the unit was assigned to the 2nd Infantry Division.
World War I: Aisne; Aisne-Marne; St. Mihiel; Meuse-Argonne; Lorraine 1918; Ile de France 1918
World War II: Normandy; Northern France; Rhineland; Ardennes-Alsace; Central Europe
Korean War: UN Defensive; UN Offensive; CCF Intervention; First UN Counteroffensive; CCF Spring Offensive; UN Summer-Fall Offensive; Second Korean Winter; Korea, Summer-Fall 1952; Third Korean Winter; Korea, Summer 1953