King Amalric died on 11 July 1174. The succession was deliberated for a few days, and the High Court convened to elect the new king. Hamilton presumes that Miles, as seneschal, presided over the meeting. Amalric's 13-year-old son,
Baldwin IV, was elected unanimously according to William of Tyre, despite being suspected of having
leprosy. Because he was a minor, a
regent was needed to rule in his name. According to law, which Hamilton presumes to have been set at this time, the regency belonged to the minor king's nearest male relative on his father's side. The High Court apparently did not decide on this occasion who this was in the case of Baldwin IV, and so the government devolved on Miles in his capacity as seneschal. Having acquired the lordship of Transjordan and the complete control of the kingdom's civil government, Miles wielded significant power and attempted to rule
autocratically by excluding other noblemen from the government. William narrates that Miles wished to "lessen the envy of his fellows" and so formally obeyed the
castellan of Jerusalem,
Rohard of Jaffa, while reserving all power to himself. In the interpretation of the historian
Jonathan Riley-Smith, Miles arranged for Rohard to be given the title of regent. Hamilton believes that Miles instead appointed Rohard to be the personal guardian of the young king, "a title which", in the words of William of Tyre, "sounded good but conferred no power". King Amalric had agreed to launch a joint attack on Egypt with King
William II of Sicily. The Sicilians were unaware of Amalric's death when they set sail. Miles prepared by renewing peace with Damascus. A large Sicilian force
laid siege to
Alexandria on 28 July. Miles had no say in military matters, however; they were in the hands of the
constable,
Humphrey II of Toron. Such a major military operation also required the support of the Hospitallers and the Templars. The Hospitallers had still not financially recovered from Amalric's previous attempt, and Hamilton argues that the master of the Temple,
Odo of Saint-Amand, was too similar in character to the haughty seneschal to cooperate well with him. The constable therefore made no attempt to muster an army to join the Sicilians, who left the siege after five days. Shortly after the failed siege, Count
Raymond III of Tripoli came before the High Court to claim the regency. He said that he was King Baldwin IV's closest kinsman and the most powerful vassal, and that he himself had appointed King Amalric as his regent during his decade-long imprisonment. Lords Humphrey II of Toron,
Reginald of Sidon,
Baldwin II of Ramla, and
Balian of Ibelin supported Raymond's claim; according to William of Tyre, so did all the bishops and almost all the people. Miles ruled that Raymond's request would be considered when the High Court convened in full, but sent Balian of Jaffa, brother of the castellan, Rohard, on a secret mission to northern Europe with gifts and letters. The seneschal's enemies began spreading rumors that he was going to seize the throne with the assistance of his friends and family in France. Hamilton suggests that Miles may have hoped to secure the appointment to the regency of one of the closer royal kinsmen who lived in Europe; while Raymond was King Amalric's first cousin, King Amalric's half-nephews King
Henry II of England, Count
Philip I of Flanders, and Bishop-elect
Peter of Cambrai had a better claim to the regency. One of these might have then empowered Miles to rule on his behalf. Hostility towards Miles built up, and a plot against his life was hatched. He was warned, but refused to take precaution. He was subsequently stabbed to death on an October evening in a street in
Acre. William does not name the killers; Hamilton explains that William could not have done so even if he knew who they were because he would have faced legal repercussions if he failed to prove his allegations. According to the
Annales of
Caffaro, written in
Genoa 1200, the assassins were the "lords of Beirut". Hamilton presumes that this refers to Walter Brisebarre and his brother
Guy, and that they resented Miles because he did not restore Beirut to them after Amalric's death. According to Hamilton, William implies that the killers may have been incited by some of the more powerful enemies of the seneschal. The widowed lady of Transjordan, Stephanie, considered Raymond responsible. Miles's death caused a power vacuum in the kingdom, and the young king had to preside over council meetings until finally Raymond was accepted as regent. Nobody was tried for the murder. ==Assessment==