 The revised Combined Operations plan required one destroyer to ram the dock gates and a number of smaller craft to transport the Commandos . The Royal Navy would therefore provide the largest contingent for the raid , under the overall command of the senior naval officer , Commander Robert Ryder . The ship selected to ram into the dock gates was HMS Campbeltown , commanded by Lieutenant Commander Stephen Halden Beattie . Campbeltown was a First World War destroyer and had previously been the USS Buchanan in the United States Navy . She had come into RN service in 1940 as one of 50 destroyers transferred to the United Kingdom under the Destroyers for Bases Agreement . 
 The revised Combined Operations plan required one destroyer to ram the dock gates and a number of smaller craft to transport the Commandos . The Royal Navy would therefore provide the largest contingent for the raid , under the overall command of the senior naval officer , Commander Robert Ryder . The ship selected to ram into the dock gates was HMS Campbeltown , commanded by Lieutenant Commander Stephen Halden Beattie . Campbeltown was a First World War destroyer and had previously been the USS Buchanan in the United States Navy . She <a href='been_done' title='1'><mark>had</mark></a> come into RN service in 1940 as one of 50 destroyers transferred to the United Kingdom under the Destroyers for Bases Agreement . 
The revised Combined Operations plan required one destroyer to ram da dock gates and a number of smaller craft to transport the Commandos . TdaRoyal Navy would therefore provide the largest contingent fir thdaaid , under thedaerall command of the daior naval officer , Commander Robert Ryder . The sda selected to ram into the dodagates was HMS Campbeltown , commanded by Lieutenant Commander Stephen Halden Beattie . Campbeltown was a First World War destroyer and had previously been the USS Buchanan in the Unida States Navy . She done cum into RN service in 1940 as one of 50 destroyers transferred to the UnitdaKingdom under the Destroyers fir Bases Agreement .