Operation Josephine B: Sabotage of the Pessac Transformer Station

Objective and Wartime Context

Operation Josephine B (also referred to as Operation Josephine) was a targeted sabotage mission carried out during the Second World War. The primary objective was the destruction of an electrical transformer station located in Pessac, near Bordeaux, France [1]. The station had been identified by the Special Operations Executive (SOE) as a target of significant strategic interest, though its location made it difficult to reach via traditional aerial bombardment [1].

Planning and Personnel

The mission was a collaborative effort organised jointly by the British SOE and the Free French forces [1]. Logistics and delivery of the operational team were handled by the Royal Air Force (RAF), which provided the necessary air drops to insert the saboteurs into occupied France [1].

Historical accounts associate the operation with Major C. V. Clarke [3, 4]. While some retrospective accounts suggest the operation took place in 1942 [3, 4], official records and other summaries date the mission’s primary window from 11 May 1941 to 7 June 1941 [1].

Execution and Tactics

The operational plan involved dropping a team of saboteurs by parachute into the vicinity of the target [1]. The team was tasked with infiltrating the transformer station, evading guards, and planting explosive charges on the transformers [1, 3].

The equipment used included explosive charges described as being similar to miniature limpet mines [3]. These charges were reportedly carried by the saboteurs on a plate attached to their backs [3]. To ensure the safety of the team and allow for a timely exit from the area, the explosives were fitted with delay timers, allowing the bombs to detonate after a predetermined interval [1, 3].

The mission initially faced setbacks and was stalled due to a lack of up-to-date intelligence on the target area [1]. However, the team eventually succeeded in breaching the facility and planting the charges [1].

Outcome and Significance

Operation Josephine B is recorded as an Allied success [1]. The saboteurs successfully destroyed the electrical transformer station at Pessac, achieving the mission’s main objective [1]. The operation demonstrated the efficacy of combining RAF delivery capabilities with SOE sabotage expertise and Free French cooperation to strike high-value infrastructure targets that were otherwise difficult to access [1].

Archival Records

Records pertaining to Operation Josephine B are held at The National Archives in Kew, UK. Specifically, file reference HS 6/347 contains documentation regarding the sabotage of the transformer sub-station at Pessac, including newspaper cuttings in French and German from the 1941–1942 period [2].