), was a Royal Horse Artillery brigade[a] of the Territorial Force that was formed in Egypt in April 1916 for the ANZAC Mounted Division.

Both brigades served with the ANZAC Mounted Division during the Sinai and Palestine Campaign of World War I.

[3] III Brigade, Royal Horse Artillery (Territorial Force) was formed in April 1916 in the Egyptian Expeditionary Force for the division with[4][b] The batteries had been assigned to the North Midland and 2nd South Western Mounted Brigades, respectively, at the outbreak of the war,[5] each equipped with four[6] Ehrhardt 15-pounder guns.

[7] The batteries had arrived in Egypt independently;[3] Leicestershire RHA landed at Alexandria on 25 February 1916.

[10] The brigade, and its batteries, served with the ANZAC Mounted Division in the Sinai and Palestine Campaign until July 1917.