In the wake of Operation ‘Chastise’, fears mounted about the possibility of German retaliation against important British dams

Following destruction of the Möhne and Eder dams by No 617 Squadron, AVM Ralph Cochrane, AOC No 5 Group, observed that the Germans had been “thoroughly scared”. Albert Speer, minister of munitions, was hauled out of bed to organise the clean-up organisation and repair of the damage, which entailed the relocation of thousands of labourers and technical specialists within and beyond the Ruhr from important war-related work, including strengthening of coastal defences against allied invasion.