 He called for specially trained troops that would "develop a reign of terror down the enemy coast".At first they were a small force of volunteers who carried out small raids against enemy occupied territory, but by 1943 their role had changed into lightly equipped assault Infantry which specialised in spearheading amphibious landings.The man initially selected as the overall commander of the force was Admiral Sir Roger Keyes himself a veteran of the landings at Galipoli and the Zeebrugge raid in the First World War.