- John JosephBlackjack, 1860–1948, U.S. general: commander of the American Expeditionary Forces in World War I.
- a 46-ton (42 metric tons) U.S. heavy tank of 1944–52, with a five-man crew and a 90mm gun.
- a two-stage surface-to-surface ballistic missile.
- John Joseph, nickname Black Jack. 1860–1948, US general. He was commander in chief of the American Expeditionary Force in Europe (1917–19)
- a US ballistic missile capable of carrying a nuclear or conventional warhead