Hussein, Crown Prince of Jordan being King Hussein's eldest son; the King had appointed his younger brother Prince Hassan as heir designate in 1965. Shortly before his death on 7 February 1999, the King replaced Hassan with Abdullah. When Abdullah became king, he named his younger half-brother, Prince Hamzah, as heir designate on his accession. On 28 November 2004, King Abdullah removed Hamzah from his title as crown prince. Though the title of crown prince was left vacant, the Constitution of Jordan provides for agnatic primogeniture, meaning the monarch's eldest son is automatically first in the line of succession to the Jordanian throne unless decreed
Hussein of Jordan assassinate Hussein. It also emerged in Jordan that the UAR was planning to overthrow both Hashemite monarchies in July 1958. Jordan reacted by arresting 40 suspected army officers, and Hussein called in Iraqi army chief of staff Rafiq Aref to brief him on the exposed plot. Aref replied, "You look after yourselves. Iraq is a very stable country, unlike Jordan. If there are any worries it is Jordan that should be worried". Although Faisal and Hussein enjoyed a very close relationship, Faisal's Iraqi entourage looked down on Jordan; Hussein attributed this attitude to Iraqi crown prince 'Abd al-Ilah's influence. The