Observers trace the revival to disenchantment with Arab Nationalism, as exemplified by Egypt's "shattering" 1967 defeat;[16] the perceived victory of the 1973 war with its pious battle cry of Allahu Akbar (`Land, Sea and Air` had been the slogan of the 1967 war);[17] and "to the missionary zeal" of Saudi Wahhabism, "fueled by petrodollars in the wake of the oil shock of 1974-5." [13][18]