Question: What is another name for the people that the Torra di Tizzà was created to protect against?

Context:
Torra di Roccapina
The Tower of Roccapina (Corsican: "Torra di Roccapina" ) is a ruined Genoese tower located in the commune of Sartène (Corse-du-Sud) on the southwest coast of the Corsica.
 The tower sits at an elevation of 100 m on the Cappu di Roccapina headland.
Torra di Fautea
The Tower of Fautea (Corsican: "Torra di Fautea" ) is a Genoese tower located in the commune of Zonza (Corse-du-Sud) on the east coast of the French island of Corsica.
 The tower sits at an elevation of 32 m on the Punta di Fautea.
Torra di Tizzà
The Tower of Tizzà (Corsican: "Torra di Tizzà" ) is a Genoese tower located in the commune of Sartène on the west coast of the Corsica.
 The tower was one of a series of coastal defences constructed by the Republic of Genoa between 1530 and 1620 to stem the attacks by Barbary pirates.
Torra di Capu di Muru
The Tower of Capu di Muru (Corsican: "Torra di Capu di Muru" ) is a Genoese tower located in the commune of Coti-Chiavari (Corse-du-Sud) on the west coast of the Corsica.
 The tower sits at an elevation of 100 m on the Capu di Muru headland.
Torra di Sant'Amanza
The Tower of Sant'Amanza (Corsican: "Torra di Sant'Amanza" ) is a ruined Genoese tower located in the commune of Bonifacio on the south east coast of the Corsica.
 The tower sits at a height of 125 m on the Punta di u Capicciolu headland.
 Only the round base survives.
Torra di l'Isula di Gargali
The Tower of Isula di Gargali (Corsican: "Torra di l'Isula di Gargali" ) is a ruined Genoese tower located in the commune of Osani on the eponymous islet off the west coast of the Corsica.
 The rocky islet lies within the Scandola Nature Reserve.
Barbary pirates
The Barbary pirates, sometimes called Barbary corsairs or Ottoman corsairs, were pirates and privateers who operated from North Africa, based primarily in the ports of Salé, Rabat, Algiers, Tunis, and Tripoli.
 This area was known in Europe as the Barbary Coast, a term derived from the name of its Berber inhabitants.
 Their predation extended throughout the Mediterranean, south along West Africa's Atlantic seaboard and even South America, and into the North Atlantic as far north as Iceland, but they primarily operated in the western Mediterranean.
 In addition to seizing ships, they engaged in "Razzias", raids on European coastal towns and villages, mainly in Italy, France, Spain, and Portugal, but also in the British Isles, the Netherlands and as far away as Iceland.
 The main purpose of their attacks was to capture Christian slaves for the Ottoman slave trade as well as the general Muslim slavery market in North Africa and the Middle East.
Tour de Capo di Feno
The Tour de Capo di Feno (Corsican: "Torra di Capu di Fenu" ) is a ruined Genoese tower located in the commune of Ajaccio on the west coast of Corsica.
 The ruined tower sits at a height of 68 m above the sea on the Capo di Feno headland.
 Only part of the tower survives.
Torra di l'Isuledda
The Tower of Isuledda (Corsican: "Torra di l'Isuledda" ) is a Genoese tower located in the commune of Pietrosella (Corse-du-Sud) on the Corsica.
 The tower sits at an elevation of 68 m on a promontory, the Punta di Sette Nave, which forms the southern limit of the Gulf of Ajaccio.
Torra di Senetosa
The Tower of Senetosa (Corsican: "Torra di Senetosa" ) is a Genoese tower located in the commune of Sartène (Corse-du-Sud) on the west coast of the Corsica.
 The tower sits at an elevation of 129 m on the Capu di Senetosa headland.

Answer: Ottoman corsairs