Photo: Jalal ad din Manguberdi
Manguberdi's loyal followers, however, remained loyal to him even after his death, transforming themselves into a mercenary force called the Khwarezmiyya. Thirteen years later they made history when in pay of the Ayyubid Sultan Salih Ayyub of Egypt, the Khwarezmiyya they invaded Christian-held Jerusalem, capturing the city's citadel, the Tower of David; and on July 11, 1244, forcing the surrender of the crusader army. Of great note is that after being conquered by the Khwarezmiyya, Jerusalem would stay under control of Islamic sovereignty until 1917, near the end of World War I, when it was taken from the Ottomans by victorious British and Commonwealth forces.(ED: The Australian Light Horse brigade playing a critical role in the battle).
Video: Jalal ad-Din Mingburnu (2:08)