 Although it was only a matter of time before Acre also fell, the end of the crusader kingdom was actually instigated in 1290 by newly arrived crusaders, who rioted in Acre and attacked the city's Muslim merchants.Qalawun died before he could retaliate, but his son al-Ashraf Khalil arrived to besiege Acre in April 1291.Acre was defended by Henry II's brother Amalric of Tyre, the Hospitallers, Templars, and Teutonic Knights, the Venetians and Pisans, the French garrison led by Jean I de Grailly, and the English garrison led by Otton de Grandson, but they were vastly outnumbered.