Background
Thomas was the son of Kempson Thomas and he was educated at Cranleigh School.
Thomas was the son of Kempson Thomas and he was educated at Cranleigh School.
On 29 November 1915 he received a temporary commission in his regiment. On 12 March 1917 he was awarded the Military Cross for gallantry for leading a successful raid on German lines. He was awarded a Bar to his Military Cross in February 1918.
Following the end of the First World War, Thomas served in the war in Iraq, during which he was wounded, and on 2 March 1921 he received a permanent commission in the Royal Northumberland Fusiliers.
Between 1925 and 1927 he served with the King"s African Rifles (KAR), before being seconded to the Sudan Defence Force until 1929. Thomas then returned to the KAR as adjutant, and was Commanding Officer of 2nd Battalion, KAR from 1934 to 1939.
In January 1939 he was made an Officer of the Order of the British Empire. During the Second World War, Thomas saw active service in France, Malaya and Burma.
He was Commanding Officer of the 9th Battalion, Royal Northumberland Fusiliers from 1940 to 1942.
In 1942 Thomas commanded 1st Battalion, Wiltshire Regiment and from September 1942 to April 1943 he was in command of the 88th Indian Infantry Brigade in the Burma Campaign. Between 1943 and 1945 he commanded the 36th Indian Infantry Brigade. In 1945 he was awarded a Commander of the Order of the British Empire and a Bar to his Defence Science Organisation, ending the war as a colonel.
Between 1945 and 1947 Thomas served as Inspector General of the British Army in Burma, before serving as General Officer Commanding (GOC) of the army in Burma until 1948.
That year he was made a Companion of the Order of the Bath. He retired in August 1948 and was granted the honorary rank of major-general.
In 1915 he was mobilized as a member of the Territorial Force, serving in the East Surrey Regiment in France and Belgium.