Lieutenant-Colonel H. R. H. Drew, D.S.O., assumed command on 28th July 1919, and a few days later the cadre moved to Templemore in Ireland, where they took over the companies of the 3rd Battalion which were distributed at Nenagh (" A "), Thurles (" B "), Cashel (" C ") and Templemore (" D "), and on 5th September the Headquarters of the 3rd Battalion moved to Northampton.
In addition to their other duties the battalion had to find a large draft for the 2nd Battaion, of 224 men, who sailed for India in December.
| 1920 Feb 20 | Pte G P Raynham | Died in Templemore. Natural causes? | Northampton Regt | CWGC |
| 1920 Aug 16 | Lt.Col S H Beattie | Templemore Town Hall Fire | Northampton | CWGC |
| L/Cpl H J Fuggle | Templemore Town Hall Fire | Northampton | CWGC | |
| 1920 Oct 28 | Private T Crummey | Thomastown Ambush | Northampton Regt | CWGC |
| Private F A Short | Thomastown Ambush | Northampton Regt | CWGC | |
| 1920 Nov 4 | Lt H J Hambleton | Shot near Nenagh - Intelligence Officer | Northampton Regt | CWGC |
| 1921 Jun 6 | Private F G Carroll | Accidently shot Templemore | Northampton Regt | CWGC |
Lt H J Hambledon was the Batallion Intelligence Officer, and he was shot near Nenagh
Lt BAEM Hall was the Intelligence Officer in 1921