Israeli infiltration being organised retaliatory raids by military units such as Qibya and Nahhalin raids. Israel’s frustration with the UN and the other parties led to their withdrawal from ISMAC in 1951 and HKJIMAC in 1954. The functioning of the Israel Lebanon MAC remained smooth due to the more relaxed attitude of the Israeli patrols towards returnees and infiltrators. Disputes with Egypt, who banned Israel-bound shipping from the Suez Canal and blockaded the Gulf of Aqaba, pertained to the al-Auja DMZ. By 1955, Israel ceased attending the Egyptian MAC and stepped up raids into the Gaza Strip and Sinai to which Egypt retaliated by sponsoring the Palestinian fedayeen (self-sacrificer) raids. The full-scale 1956 invasion of Egypt by British, French and Israeli forces, The invasion followed Egypt's decision of 26 July 1956 to nationalize the Suez Canal after the withdrawal of an offer by Britain and the United States to fund the building of the Aswan Dam.The invasion demonstrated UNTSO’s irrelevance in the process.