[21] All three battalions were assigned to British divisions and took part in the final Allied offensive of the Sinai and Palestine Campaign (the Battles of Megiddo).

[12][22][23] The 1st Battalion was formed at Amara on 24 May 1918 by the transfer of complete companies from:[20][c] It moved to Basra on 29 May where it embarked on 22 June for Egypt.

It remained with the division for the rest of the Sinai and Palestine Campaign,[20] taking part in the Battle of Sharon (19 September 1918).

[12] The division was then withdrawn into XXI Corps Reserve near Et Tire where it was employed on salvage work and road making.

It remained with the division for the rest of the Sinai and Palestine Campaign,[27] taking part in the Battle of Sharon (19–21 September 1918).

It remained with the division for the rest of the Sinai and Palestine Campaign,[21] taking part in the Battle of Nablus (18–21 September 1918).

The Indian infantry battalions returned to India as transports became available and 159th Brigade was reduced to cadre by 7 March 1919.