Lt. Colonel Fleming Mackenzie was born in Tapah, Malay Straits' Settlements (Malaysia) in 1897. His father was the Chief Surveyor for the opening up of the area. He returned to England with his mother, attending first St Paul's and later Bedford schools.
At the outbreak of WWI, Mackenzie became a tank commander and was present throughout the Battle of Cambrai. Joining the Indian Army (1st Battalion, XV Punjab Regiment) after the War, he served in Calcutta, recruiting in Palampur, and moved with his battalion up to the North West Frontier (bordering Waziristan and Afghanistan) in 1936. He was part of the Escort to the Trade Agent to Tibet in 1938-39.
During the 1939-45 War, Mackenzie raised a battalion of the XV Punjab Regiment and later commanded a battalion of the Mahratta Light Infantry fighting in the Greek Islands. He retired from the Indian Army after Partition in August 1947.
Returning to the UK, Mackenzie later qualified as a Guide Lecturer and escorted many foreign visitors, including some who came for the Queen's Coronation in 1953. He died in 1980.