43rd Division
- 43d Air Division
- 43rd (Wessex) Infantry Division
- 43rd Battalion (disambiguation)
- 43rd Brigade (disambiguation)
- 43rd Cavalry Division (Soviet Union)
- 43rd Division (Imperial Japanese Army)
- 43rd Division (North Korea)
- 43rd Division (People's Republic of China)
- 43rd Group (disambiguation)
- 43rd Infantry Division (Somalia)
- 43rd Infantry Division (United States)
- 43rd Regiment (disambiguation)
- 43rd Reserve Division (German Empire)
- 43rd Squadron (disambiguation)