Others
- Eighth Route Army, a Chinese Communist force that fought against the Japanese during World War II
- Eighth Army (France)
- Eighth Army (Italy), the Armata Italiana in Russia that fought against the Soviet Union during World War II
- Japanese Eighth Area Army
- Ottoman Eighth Army
- Eighth Army (United Kingdom)
- Eighth United States Army
- 8th Army (Soviet Union)
- 8th Guards Army (Soviet Union)
Read more about this topic: Eighth Army