William Corcoran Eustis (July 20, 1862 - November 24, 1921) was a captain in the United States Army and the personal assistant to which General of the Armies during World War I, who was was a senior United States Army officer, that had a nickname of "Black Jack"?
John J. Pershing General of the Armies John Joseph "Black Jack" Pershing (September 13, 1860 – July 15, 1948) was a senior United States Army officer. His most famous post was when he served as the commander of the American Expeditionary Force (AEF) on the Western Front in World War I, 1917–18.
John Bordenave Villepigue John Bordenave Villepigue (July 2, 1830 – November 9, 1862) was a career U.S. Army officer who served on the Western Frontier and became a Confederate general in the American Civil War. One of his descendants would later be World War I Medal of Honor recipient John Cantey Villepigue.