During the inter-war years, the regiment was re-raised as a part-time unit based in the Corangamite region of southern Victoria.

In the post war period, the regiment was re-raised as an amalgamated unit, designated the 4th/19th Prince of Wales's Light Horse, which is currently part of the Australian Army Reserve.

[1] Light horse regiments normally comprised twenty-five officers and 497 other ranks serving in three squadrons, each of six troops.

In action one man of each section was nominated as a horse holder reducing the regiment's rifle strength by a quarter.

[1] When the rest of the division departed to take part in the Gallipoli, the light horse were left behind the authorities under the belief that mounted troops would not be needed in the campaign due to the terrain.

After this, they were mostly used to defend the Allies' precarious position on the peninsula, especially in the area of "Ryrie's Post", although they did take part in several small assaults.

[1] The Ottoman Empire signed the Armistice of Mudros on 30 October 1918, and the war in the Middle East ended.

[8] As a result, the 4th Light Horse was re-raised as a part-time unit based in the 3rd Military District, which encompassed the majority of the state of Victoria.

[9] In 1943, it was gazetted as an AIF unit after the majority of its personnel volunteered to serve outside of Australian territory; nevertheless, it did not serve overseas and in June 1944, as the Australian Army undertook a partial demobilisation, the regiment was deemed surplus to requirements and was disbanded without having seen operational service during the war.

[9] In the post war period, the regiment was re-raised as an amalgamated unit, designated the 4th/19th Prince of Wales's Light Horse.