Israel retaliated against Egyptian shelling with commando raids, artillery shelling and air strikes. This resulted in an exodus of civilians from Egyptian cities along the Suez Canal's western bank. Nasser ceased all military activities and began a program to build a network of internal defenses, while receiving the financial backing of various Arab states. The war resumed in March 1969. In November, Nasser brokered an agreement between the PLO and the Lebanese military that granted Palestinian guerrillas the right to use Lebanese territory to attack Israel.