Fifth Army
- 5th Army (Austria-Hungary)
- 5th Army (German Empire)
- 5th Army (Kingdom of Yugoslavia)
- 5th Army (RSFSR)
- 5th Army (Russian Empire)
- 5th Army (Soviet Union)
- 5th Army (Wehrmacht)
- 5th Combined Arms Army
- 5th Panzer Army
- 88th Division (National Revolutionary Army)
- Cold War
- Fifth Army (Bulgaria)
- Fifth Army (France)
- Fifth Army (Italy)
- Fifth Army (Japan)
- Fifth Army (Ottoman Empire)
- Fifth Army (United Kingdom)
- Fifth United States Army
- Special Frontier Force
- Warsaw Pact