Alaska, on 3 January 1941, where it was assigned to the Alaska Defense Command. Regiment arrived on Kodiak Island on 23 November 1942. Regiment arrived on Unalaska Island on 30 November 1942. Regiment posted to Adak Island on 8 December 1942. Regiment Assaulted Attu Island on 11 May 1943, and participated in the Battle For Fish Hook Ridge. Regiment relieved from assignment to Alaskan Defense Command, and returned to Seattle Port of Embarkation on 2 December 1943, and was stationed at Fort Lewis the same date. Regiment reassigned to the US Army Replacement and School Command at Fort Benning, Georgia, on 23 January 1944, where it conducted infantry training to prepare for the expected invasion of the Japanese Home Islands late in 1944. Regiment was at Fort Benning on 14 August 1945, which is when the surrender of the Japanese was announced. Assigned 1 November 1945 to the 25th Infantry Division. The incumbent personnel and equipment were reassigned to the 4th Infantry Division at Camp Butner, North Carolina, while the regimental records and accoutrements were forwarded to Japan for occupation duty. Inactivated 31 January 1947 in Japan Relieved 1 February 1947 from assignment to the 25th Infantry Division Activated 1 October 1948 at Fort Lewis, Washington, as a separate regiment. Assigned 10 October 1954 to the 71st Infantry Division Relieved 15 September 1956 from assignment to the 71st Infantry Division Reorganized 15 February 1958 as a parent regiment under the U.S. Army Combat Arms Regimental System, and assigned as follows: 1st Battle Group assigned to 2d Infantry Brigade. 2d Battle Group assigned to 3d Infantry Division. 1st Battle Group inactivated 2 April 1962 at Fort Devens, Massachusetts. 1st Battle Group relieved from assignment to the 2d Infantry Brigade, redesignated as the 1st Battalion, 4th Infantry, and assigned to the 3d Infantry Division on 18 April 1963. On 3 June 1963, 2d Battle Group's personnel and equipment were reassigned to the 1st Battalion, still with 3d Infantry Division. 1st Battalion, 4th Infantry activated on 5 June 1963. 2d Battle Group redesignated at 2d Battalion, 4th Infantry on 21 July 1969 and activated at Fort Campbell, Kentucky. Withdrawn 17 January 1986 from the Combat Arms Regimental System and reorganized under the United States Army Regimental System 1st Battalion inactivated on 16 December 1987 in Germany, and relieved from assignment to 3d Infantry Division. 1st Battalion activated on 16 November 1990 in Germany.