Assigned to the 1st Division in 1917, the 28th was the primary unit involved in the attack on Cantigny and was later given the nickname “The Black Lions of Cantigny” after the unit’s successful attack during that battle. As of 2018, the 1st Battalion of the 28th Infantry Regiment is still serving as part of the 3rd Infantry Division.

Nicknamed the “Blue Spaders” for a device on their regimental distinctive unit insignia, the 26th Infantry Regiment was authorized by Congress in 1901 to meet American overseas commitments and formed part of what became the 1st Division in 1917.  Operating in support of the 28th Infantry’s attack at Cantigny and seeing heavy fighting near Soissons during World War I, like its sister regiments in the 1st Division, the 26th Infantry earned seven battle streamers and two foreign awards during the war. The regiment’s 1st Battalion is currently part of the 101st Airborne Division (Air Assault).

Reinforcing the 28th Infantry Regiment following its successful seizure of Cantigny, the 18th Infantry Regiment would later serve in the St. Mihiel and Meuse-Argonne Offensives and won fame during World War II for its storming of Omaha Beach during the Normandy Invasion. The unit is still part of the 1st Infantry Division and is nicknamed “Vanguards.”

Like their counterparts in the 18th Infantry Regiment, the troops of the 16th Infantry relieved and reinforced units of the 28th Infantry during the Battle of Cantigny. Noted for success during the Meuse-Argonne Campaign, and later during the first grim hours of the assault on Omaha Beach during World War II, the 16th Infantry would remain with the 1st Division to the present day.

Constituted and organized in 1916, the 7th Field Artillery Regiment was assigned to the 1st Division in 1917 and provided crucial fire support to the Cantigny assault with its French-made 75mm guns. The 7th Field Artillery continued to provide fire support to the 1st Division until the end of World War I, and currently remains with the 1st Infantry Division.

The 5th Artillery Regiment, constituted as part of the Regular Army in 1907, traces its lineage even further to the American Revolution. The regiment supported 1st Division infantrymen in five major battles of World War I, including those in Lorraine, Picardy, and the Meuse-Argonne, and continues to form part of the 1st Infantry Division.

Formed after the expansion of the 1st Engineer Battalion. The oldest such unit in the U.S. Army, the 1st Engineer Regiment participated in campaigns in Lorraine and the Meuse-Argonne during World War I, receiving several French awards for its service.