Siege of Tripoli (1551)

Background. Hospitaller rule in Tripoli was marked by constant conflict with the Ottoman Empire and local hostilities. In the 1540s, the Order considered moving its headquarters to Tripoli, a plan Suleiman likely sought to thwart. The capture of Mahdia by Spanish forces in 1550 further provoked the Ottomans to launch a punitive expedition in 1551.

Preparations. In May 1551, Governor Gaspard de Vallier warned Grand Master Juan de Homedes of an assembling Ottoman fleet. The Order evacuated women, children, and invalids to Malta by 13 July. Meanwhile, the Ottoman fleet, comprising 145 ships and 10,000 to 12,000 men, departed Gozo for North Africa on 30 July after raiding the island.

Siege. Ottoman forces reached Tajura before the French ambassador D'Aramont arrived in Tripoli. Admiral Sinan Pasha offered terms to spare the garrison if the city surrendered peacefully. The siege began on 8 August, with D'Aramont attempting to dissuade the Ottomans but being barred from leaving until the siege concluded.

Surrender. The Hospitallers accepted the Ottoman terms, and Tripoli capitulated on 14 August 1551 without consulting the Grand Master. On 15 August, part of the garrison, including knights, departed for Malta on ships provided by D'Aramont. Some mutineers attempting to flee to Sicily were captured by Ottoman cavalry.