In 1937, on the occasion of the visit of King George VI and Queen Elizabeth to the province, the IRA blew up a number of customs posts. In 1939 the IRA launched its Sabotage Campaign in England. This campaign effectively ended on 25 August, a few days before the outbreak of the Second World War. The war brought additional responsibilities for the police. The security of the land border with the Republic of Ireland, which remained neutral during the war, was one important consideration. Allied to this was a greatly increased incidence of smuggling due to rationing, to the point where police virtually became revenue officers. There were also many wartime regulations to be enforced, including "black-out" requirements on house and vehicle lights, the arrest of striking workers, port security, and restrictions on the movement of vehicles and use of petrol.