9 South Louth Brigade -1 Eastern Division
1 Battalion: Unit strength on 11 July 1921 was 151 all ranks, and the strength on 1 July 1922 was 83 all ranks. The companies of the 1 Battalion were located as follows: Drogheda, Slane.
2 Battalion: Unit strength on 11 July 1921 was 74 all ranks, and the strength on 1 July 1922 was 36 all ranks. The companies of the 2 Battalion were located as follows: Dunleer, Termonfeckin.
3 Battalion: Unit strength on 11 July 1921 was 32 all ranks, and the strength on 1 July 1922 was 67 all ranks. The companies of the 3 Battalion were located as follows: Ardee, Smarmore, Collon, Churchtown, Barley Hill, Drumconrath, Meath Hill.
9 South Louth Brigade -1 Eastern Division Featured Operations
9 South Louth Brigade -1 Eastern Division Operations List (includes those not featured on the map)
| Operation | County | Location | Date | |
| Attack on Ardee Barracks | Louth | Ardee | May 1921 | |
| Destruction of Collon RIC Barracks | Louth | Collon | May 1920 |