101st Battalion
- 101 Battalion (Libya)
- 101 Battalion (South Africa)
- 101 Squadron (disambiguation)
- 101st Battalion (Winnipeg Light Infantry), CEF
- 101st Brigade (disambiguation)
- 101st Division (disambiguation)
- 101st Engineer Battalion
- 101st Infantry Battalion
- 101st Regiment (disambiguation)
- 101st Signal Battalion
- Reserve Police Battalion 101