34th Brigade
- 34 Canadian Brigade Group
- 34th (South Midland) Anti-Aircraft Brigade
- 34th Armoured Brigade (United Kingdom)
- 34th Battalion (disambiguation)
- 34th Brigade (Australia)
- 34th Brigade (United Kingdom)
- 34th Brigade Royal Field Artillery
- 34th Combat Aviation Brigade
- 34th Division (disambiguation)
- 34th Independent Motor Rifle (Mountain) Brigade
- 34th Indian Brigade
- 34th Indian States Forces Infantry Brigade
- 34th Infantry Brigade (Romania)
- 34th Mechanized Infantry Brigade (Greece)
- 34th Regiment (disambiguation)
- 34th Squadron (disambiguation)