Roger Arthur Landes, LdH CdeG MC & Bar (16 December 1916 – 16 July 2008), code named Stanislas and Aristide, was an agent of the United Kingdom's clandestine Special Operations Executive (SOE) organization during World War II in France.

The purpose of SOE was to conduct espionage, sabotage, and reconnaissance in countries occupied by the Axis powers, especially Nazi Germany.

SOE agents allied themselves with resistance groups and supplied them with weapons and equipment parachuted in from England.

He was an effective agent for the SOE, organizing and arming the French Resistance in southwestern France, and evading capture by the German occupiers.

Barnet's grandfather had fled Russian Poland to avoid the pogroms and Imperial conscription, setting up a jewelry business in Hatton Garden before settling in Paris.

Barnet spoke poor English and so preferred to live in Paris and run a jewelry business there.

Arriving in Bordeaux, he made contact with de Baissac and, after initial problems, found a house from which he could send and receive messages from SOE in Paris.

[6] In June 1943, the Germans penetrated and destroyed the Prosper network in Paris and the fallout put the Scientist agents in Bordeaux in danger.

De Baissac requested or was ordered to return to England to avoid arrest and he and his sister, Lise, flew back by Lysander on the night of 15/16 August.

Roger Landes, Vic Hayes, Marcel Défense, and Mary Herbert (pregnant with de Baissac's child) remained in Bordeaux to continue working.

[8] The most important contact of the Scientist network in Bordeaux was André Grandclément, a retired army colonel and a leader of the far-right resistance organization, the Organisation civile et militaire (OCM).

Landes, armed with a pistol, intended to kill Grandclément, but was dissuaded by Corbin who did not want a gunshot to attract the Gestapo's attention to his house and family.

With the information provided by Grandclément, the Germans were able to arrest 78 of Landes's associates and confiscate thousands of guns and millions of rounds of ammunition that SOE had parachuted into the resistance groups.

On 26 November 1943, Landes gave each of his surviving resistance leaders 25,000 francs (about 125 British pounds) for living expenses and set out on foot with Charles Corbin to cross the Pyrenees to Spain.

[11] Landes was suspected of being a double agent because of his "miraculous"[12] escape from capture by the Germans, but his name was cleared and he returned to Bordeaux in March 1944 as organiser of the Actor network, a new circuit tasked with making contact with surviving Resistance groups in the area and coordinating sabotage to support the upcoming D-Day landings.

He imposed strict security rules on the leaders and groups of the French resistance which he supported with parachuted arms drops that began on 1 April 1944.

Landes ran afoul of some French resistance leaders, notably the right wing, Anglophobic soldier Jean-Baptiste Morraglia, who arrived in Bordeaux on 6 May and attempted to take charge of the resistance in the region on behalf of Free France leader Charles de Gaulle.

[14] Despite his problems, by 6 June 1944, when the allied invasion of Normandy took place, Landes had equipped a fighting force of 5,000 men.

The resistance had been ordered by French authorities in London to kill Grandclémeent and his wife, Lucette, who had also been captured.

"[19] In 1945, Landes volunteered to join SOE's Force 136 in Southeast Asia to take part in the war against Japan.In March he was sent to Colombo, and in May he and 15 commandos were parachuted into the Malayan jungle near the Thailand frontier.

An appraisal of him by the head of SOE French section, Maurice Buckmaster, was: "As a man he is not awfully attractive and I think his friends are as a whole most unpleasing.

Landes was even complimented later by the Gestapo chief in Bordeaux, Frederik Dohse, "Nothing in his previous life had in any way predestined him for the extremely dangerous role he now played so well.