Some action was seen at Lahej, the Brecknocks helped to keep the advancing Turks from a defensive position that had been set up in a large walled garden. Soon, however, a withdrawal was ordered and the column fell back to the Khor Maksar lines, where, an account of the operation was undertaken. There had been thirty deaths from heatstroke (half of this number being men from the Brecknockshire Battalion); four of the Battalion were missing (one had been taken prisoner) and three were wounded. In addition to these casualties, many men were subsequently considered to be unfit for active service and were sent home.
Those that remained were relieved by a battalion of the Buffs and on 5 August sailed for India. Reaching Bombay on the 11th, the 1/1st Brecknockshire Battalion were then sent to Mhow, where it would remain until August, 1919, moving then to Calcutta. As a battalion, the only action seen by the Brecknocks was at the walled garden in Lahej. This gained for the Battalion, and the South Wales Borderers, the battle honour Aden.
Whilst the Brecknocks moved to Mhow, many of their number later chose to volunteer to fight with other battalions in other theatres of war.