The United States Army Engineer School (USAES) is located at Fort Leonard Wood, Missouri.

It was founded as a School of Engineering by General Headquarters Orders, Valley Forge on 9 June 1778.

USAES defines its mission as: Synchronize and integrate the Doctrine, Organization, Training, Material, Leader Development, Personnel, and Facilities (DOTMLPF) domains to ensure the Engineer Regiment is prepared to provide engineer support now and into the future.

General Headquarters Orders, Valley Forge, dated 9 June 1778 read "3 Captains and 9 Lieutenants are wanted to officer the Company of Sappers.

Less than a year later, Congress authorized the Corps of Engineers and constituted it at West Point as a military academy.

Although the curriculum was heavily laced with engineering subjects, the Academy commissioned officers into all branches of the service.

From 1868 to 1885, an informal School of Application existed; its first commander was Major Henry Larcom Abbot, who developed the Army's first modern underwater minefield system there.

Washington Barracks was transferred to the General Staff College and the Engineer School moved to Camp A.

[3] After 68 years, in 1988, the home of the Engineer School was moved to Fort Leonard Wood, Missouri "due to a shortage of land for training at Fort Belvoir" [3] The move also allowed engineer training of officers, warrant officers and enlisted to be conducted in the same location.

[4] The distinctive insignia for the U.S. Army Engineer School was approved by the War Department on June 27, 1929.

The castle has been used by the Corps since 1840, when it was adopted as a device on the uniform of the Cadets of the United States Military Academy.