In the mid-1950s, Yemen supported a number of revolts by disgruntled tribes against protectorate states. The sectarian violence in Yemen Kingdom and Aden during 1956-60 resulted in some 1,000 deaths.[1] The appeal of Yemen was limited initially in the protectorate but a growing intimacy between Yemen and the popular Arab nationalist president of Egypt Gamal Abdel Nasser and the formation of United Arab States increased its attraction.