Major-General George Mackintosh Lindsay, CB, CMG, CBE, DSO (3 July 1880 – 28 November 1956) was a British Army officer who played a prominent role in the development of mechanised forces during the 1920s and 1930s.

In January 1900 he was commissioned as a second lieutenant into the Rifle Brigade,[5] a regular infantry regiment, and two months later left Southampton on the SS Umbria to serve with them in South Africa in the Second Boer War.

The training for these units could focus on offensive as well as defensive operations, using heavy machine-guns in an indirect fire role, which provided substantially greater capability and flexibility in combat.

[10] Following the reduction in forces after the end of the war, the Machine Gun Corps units were disbanded and Lindsay attended the Staff College, Camberley in 1920.

Over the following year, manoeuvres and security operations gave Lindsay an early opportunity to experiment with armoured forces working in close co-operation with aircraft for support and resupply.

[1] Returning from Egypt in 1932, Lindsay was given command of the 7th Infantry Brigade at Tidworth Camp, a motorised unit which had previously been the core of the Experimental Force.

The culmination of his work with combined-arms forces was the end of the 1934 Army exercises, in which the 7th was used as part of an improvised armoured division led by Lindsay.

The immediate result of the failed experiment was to cut Lindsay off from the debate around the future of armoured warfare; he had recently been promoted to Major-General, and he would continue to rise in the Army, but he would no longer be involved with developing modern fighting doctrine.

In retirement, he worked as Director of the British National Cadet Association and as Colonel-Commandant of the Royal Tank Regiment, a ceremonial post.

He was recalled to duty and given command of the newly formed 9th (Highland) Infantry Division, a hastily mobilised second-line Territorial unit.

In 1944, he became Commissioner of the British Red Cross and the Order of St. John for North-West Europe, overseeing relief work during the liberation of France and the Low Countries.