The US 7th Infantry Division was crerated at Camp Wheeler, Georgia on 6 December 1917 and served in Alsace-Lorraine France in World War I. The division served as occupation forces in the post-war period. The division was deactivated in 1923.
The division was reactivated just prior to the US entry into World War II and was used for construction and training activities during the early part of the war. In 1943 the division was retrained in amphibious warfare and participated in the liberation of the Aleutian Islands of Attu and Kiska.
The 7th Infantry Division the participated in amphibious invasions in the Marshall Islands, Philippines, and Ryukyu Islands. The division accepted the surrender of the Japanese Army in South Korea. After the war the division served as occupation forces in Korea and Japan.
The 7th Division was stationed in Japan at the outbreak of the Korean War and participated in the Inchon Landing and was at the Yalu River when the Chinese entered the war. The 7th participated in such battles as the Heartbreak Triangle, Battle of Porkchop Hill, and the Battle of Old Baldy.
In 1971 the division was deactivated for three years. Upon reactivation it was assigned to Fort Ord, California.
The 7th Infantry Division was reactivated on 4 June 1999, at Fort Carson, Colorado, as the first Active Component/Reserve Component division. The Reserve units that make up the 7th Infantry Division are the 39th Enhanced Separate Brigade of the Arkansas National Guard, the 41st Enhanced Separate Brigade of the Oregon National Guard and the 45th Enhanced Separate Brigade of the Oklahoma National Guard. Fort Carson is the headquarters for the Division.