Henry Jervey was an officer in the United States Army who served as director, Operations Division, General Staff, during World War I. In 1917, he wrote the book Warfare of the Future. At the outbreak of World War I, Jervey was appointed brigadier general and served both as brigade and division commander. Later, he became assistant to General Peyton C. March, chief of staff in Washington. He was promoted to major general and made director, Operations Division, General Staff. He filled this position until September 1, 1921. Jervey was awarded the Distinguished Service Medal of the Army for his services as director of operations, General Staff. He also received foreign decorations from Great Britain, France, Italy and Belgium.

General Peyton Conway March was a senior officer of the United States Army. He served in the Philippines, on the Mexican border, and World War I. March was the ninth Chief of Staff from 1918 to 1921, accomplishing centralized control over supply, the creation of the Air Service, Tank Corps, and Chemical Warfare Service.