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.
Paul Ambrose Oliver Paul Ambrose Oliver (July 18, 1831 – May 17, 1912) was an American explosives inventor, American Civil War Union Army captain and staff officer who was appointed to the brevet grade of brigadier general and Medal of Honor recipient. He was born on the "Louisiana", his father's merchant ship, during one of its voyages in the English Channel. Before the Civil War, he worked as a shipping merchant.