Leslie R. Brookes was born in Ballarat. He was single and a High School Teacher by trade. At the age of 24 he enlisted at Benalla on the 18th August 1914. His Unit embarked from Melbourne, Victoria, on board Transport A20 Hororata on 19 October 1914. He went from Private on the 18/8/14 and promoted to Sergeant on 20/8/14.
Promotions 2nd Lieutenant - Promotion date: 26 August 1915
Lieutenant - Promotion date: 5 February 1917
Quarter-Master and Honorary Captain - Promotion date: 5 August 1918

Discharge date 21 March 1919
Other details War service: Egypt, Gallipoli, Western Front

Discharged to British Army, 19 April 1915; joined 5th Bn, Highland Light Infantry, Cape Helles, 4 September 1915. Taken on strength, 21st Bn, AIF, Gallipoli, 22 October 1915. Evacuated to hospital, 5 December 1915. Commenced return to Australia, 20 January 1916.

Re-embarked from Melbourne on board HT 'Nestor', 2 October 1916. Rejoined 21st Bn in the field, 28 December 1916.

Commenced return to Australia on board 'Orontes', 20 December 1918. Discharged, 21 March 1919.
Tree No. 119