Suez 1956, just a few days after the fourth anniversary of the Egyptian Revolution of 1952, the Egyptian government under President Gamal Abdel Nasser nationalised the Suez Canal Company, which had been run by the French and owned privately, with the British as the largest shareholders. The Israeli–British–French invasion of Egypt which followed is known in Egypt as the Tripartite Aggression but elsewhere as the Suez Crisis. Following Israel's invasion and occupation of Egypt's Sinai Peninsula in the Six-Day War of 1967, the Canal was closed, and did not reopen until 1975. Today, the Canal is a vital link in world
Frustration–aggression hypothesis unjustified condition participants. The authors concluded that unjustified frustration leads to greater level of aggression, compared to justified frustration, which, in turn, results in higher levels of aggression compared to the non-frustration situations. In 1964, Leonard Berkowitz stated that it is necessary to have an aggression stimulus to make aggression take place. Then in 1974 and 1993, he remodified the frustration/aggression hypothesis into a theory that removed the importance of aggressive cues to the aggressive behavior. Which is to say, extremely angry subject will show aggression even if the aggression cue is absent. The most provocative theory introduced by Berkowitz