Result ~25% fewer V-1s struck the London Civil Defence Region due to Double Cross Similar World War II, Bombing of Peenemünde in World, Operation Crossbow, Operation Backfire, Operation Teardrop | ||
Military intelligence on the V-1 and V-2 weapons developed by the Germans for attacks on the United Kingdom during the Second World War was important to countering them. Intelligence came from a number of sources and the Anglo-American intelligence agencies used it to assess the threat of the German V-weapons.
The activities included use of the Double Cross System for counter-intelligence and the British (code named) "Big Ben" project to reconstruct and evaluate German missile technology for which Denmark, Poland, Sweden, and the USSR provided assistance. German counter-intelligence ruses were used to mislead the Allies about V-1 launch sites and the Peenemünde Army Research Center which were targeted for attacks by the Allies.
Timeline
PR — aerial photographic reconnaissance
- exchange of early stray V2 rocket.
— events regarding Nazi Germany V-weapon planning
— locations in Occupied France (German: Nordfrankreich)
— Polish reports of the Armia Krajowa
, — events regarding Anglo-American intelligence
, , — military operations (RAF, US, Luftwaffe)
The day after Strategic Bombing Directive No. 4 ended the strategic air war in Europe, the use of radar was discontinued in the London Civil Defence Region for detecting V-2 launches. The last launches had been on March 27 (V-2) and March 29 (V-1 flying bomb).