The Commandos were formed after the British Expeditionary Force was evacuated from Dunkirk in 1940. Prime Minister Winston Churchill called for a force to be assembled and equipped to inflict casualties on the Germans and bolster British morale. Churchill told the joint Chiefs of Staff to propose measures for an offensive against German-occupied Europe, and stated, "they must be prepared with specially trained troops of the hunter class who can develop a reign of terror down the enemy coast."