Prime Minister David Ben-Gurion tasked Ariel Sharon, then security chief of the Northern Region, with setting up of a new commando unit, Unit 101, designed to respond to fedayeen infiltrations. After one month of training, "a patrol of the unit that infiltrated into the Gaza Strip as an exercise, encountered Palestinians in al-Bureij refugee camp, opened fire to rescue itself and left behind about 30 killed Arabs and dozens of wounded." In its five-month existence, Unit 101 was also responsible for carrying out the Qibya massacre on the night of 14–15 October 1953, in the Palestinian village of the same name. Cross-border operations by Israel were conducted in both Egypt and Jordan "to 'teach' the Arab leaders that the Israeli government saw them as responsible for these activities, even if they had not directly conducted them." Moshe Dayan felt that retaliatory action by Israel was the only way to convince Arab countries that, for the safety of their own citizens, they should work to stop fedayeen infiltrations. Dayan stated, "We are not able to protect every man, but we can prove that the price for Jewish blood is high." United Nations reports indicate that between 1949 and 1956, Israel launched more than seventeen raids on Egyptian territory and 31 attacks on Arab towns or military forces. Egypt-sponsored insurgency The terms of the Armistice Agreement restricted Egypt’s use and deployment of regular armed forces in the Gaza strip. In keeping with this restriction, the Egyptian Government’s solution was to form a Palestinian para-military police force. The Palestinian Border police was created in December 1952. The Border police were placed under the command of ‘Abd-al-Man’imi ‘Abd-al-Ra’uf, a former Egyptian air brigade commander, member of the Muslim Brotherhood and member of the Revolutionary Council. 250 Palestinian volunteers started training in March 1953, with further volunteers coming forward for training in May and December 1953. Some Border police personnel were attached to the Military Governor’s office, under ‘Abd-al-‘Azim al-Saharti, to guard public installations in the Gaza strip. From late 1954 onwards, larger scale Fedayeen operations were mounted from Egyptian territory. The Egyptian government supervised the establishment of formal fedayeen groups in Gaza and the northeastern Sinai. General Mustafa Hafez, commander of Egyptian army intelligence, is said to have founded Palestinian fedayeen units "to launch terrorist raids across Israel's southern border," nearly always against civilians. In a speech on 31 August 1955, Egyptian President Nasser