The 23rd Infantry Brigade was an infantry brigade of the British Army that saw active service in the First World War, mainly on the Western Front During the Second World War, the brigade saw active service in the Syria-Lebanon Campaign, the Western Desert Campaign, and the Burma Campaign.

The commanders of the 23rd Infantry Brigade during the First World War were:[2][3] During the inter-war period, the Canal Brigade had been formed to defend the Suez Canal.

As part of the Tobruk garrison, the brigade helped to fend off Rommel's Axis forces until the siege was relieved at the end of the year during Operation Crusader.

In March 1942, the 70th Infantry Division arrived in India.

The brigade was retrained as a long range penetration unit.