[1] He attended a Cornell University in New York and after one year, Sebree was transferred to the United States Military Academy at West Point.

In 1936, newly promoted Captain Sebree was ordered back to States, where he attended a special officers course at Command and General Staff School at Fort Leavenworth, Kansas.

After completion of course, Captain Sebree was appointed an Aide to Major general Herbert J. Brees, commander of VIII Corps at Fort Sam Houston, Texas.

Sebree spent over three years in that capacity and in 1940, he was transferred to the staff of the 9th Infantry Division under command of Major General Jacob L. Devers.

During the Lorraine Campaign, Sebree led an independent task force of infantry and armored units with artillery and supporting arms in the liberation of Nancy.