In 1939 he was commissioned into the Royal Naval Volunteer Reserve on the outbreak of war and volunteered for the
Royal Navy, commanding a minesweeper and then a
motor torpedo boat flotilla. and in 1941 he was taken on by SOE. He became second-in-command of the
Helford Flotilla under
Gerry Holdsworth. At the end of 1942 he was in
Algiers when
Admiral Darlan was also there at the time of the Allied landings. He met
Fernand Bonnier de La Chapelle several times before La Chapelle assassinated Darlan. Brooks Richards always denied that Bonnier de la Chapelle, who moved in Royalist circles, was working for SOE. In May 1943, after the liberation of Tunis,
Commander Brooks Richards was head of F section in Algiers, directing SOE agents parachuted into enemy territory or landed at night on the beaches. In Algiers, he got to know
Charles de Gaulle. and wrote an account of this period in his book
Secret Flotillas. In Autumn 1944 he served in the staff of
Duff Cooper, minister-resident charged with re-opening the British embassy in Paris, and in 1945 he became a reservist in the
Royal Naval Reserve (RNR). ==Post war==