sentences:  Starting from the Siege of Rhodes (1522), Seydi Ali Reis participated in every major naval campaign of the Ottoman Navy in the Mediterranean Sea.He commanded the left wing of the Ottoman fleet of Hayreddin Barbarossa Pasha which defeated the Holy League of Charles V under the command of Andrea Doria at the Battle of Preveza (1538).He also commanded several ships of the fleet of Sinan Pasha and Turgut Reis which conquered Tripoli in Libya from Spain and the Knights of Malta in 1551.