Field Marshal Sir John French , commander of the British Expeditionary Force ( BEF ) , co-operated Collaboration with the French strategy to capture Vimy Ridge , by planning British attacks against Aubers Ridge .

Against the established Building conventions of warfare Hostile_encounter , he forced Request the captured Conquering crew to assist Assistance in bringing Bringing `` Leander '' safely into Corfu , and denied Agree_or_refuse_to_act them food and medical treatment Cure unless they co-operated Collaboration with their captors .