The 1st Infantry Division was initially constituted as the First Expeditionary Division in May of 1917 before being officially organized in New York City on June 8, 1917, under the command of Brig. Gen. William L. Siebert.

On Thursday to recognize the 100th anniversary of the 1st Infantry Division, the “Big Red One” will conduct a division run and a Victory with Honors ceremony.

The division run will begin at 6:30 a.m. on Fort Riley’s Custer Hill. Every unit at Fort Riley will participate in the run, led by Brig. Gen. Patrick D. Frank, 1st Inf. Div. and Fort Riley acting senior commander, and other division leaders. The four-mile path will take Soldiers around Custer Hill and past displays of military equipment.

The Victory with Honors ceremony will begin at 10 a.m. This will be the official recognition ceremony for the division’s 100th anniversary, complete with the firing of the period cannon “Old Thunder,” Soldiers in uniforms from throughout the division’s history and a look back at the major conflicts that have defined the world and the division over the last century.