Aruj Barbarossa in the context of "Barbary corsair"

The Regency of Algiers was an early modern semi-independent Ottoman province and nominal vassal state on the Barbary Coast of North Africa from 1516 to 1830. Founded by the privateer brothers Aruj and Hayreddin Reis (also known as the Barbarossa brothers), the Regency succeeded the Kingdom of Tlemcen as a formidable base that waged maritime holy war (Jihad) on European Christian powers. It was ruled by elected regents under a stratocracy led by Janissaries and corsairs. Despite its pirate reputation in Europe, Algiers maintained long-standing diplomatic ties with European states and was a recognized Mediterranean power.

The Regency emerged in the 16th-century Ottoman–Habsburg wars. As self-proclaimed ghazis gaining popular support and legitimacy from the religious leaders at the expense of hostile local emirs, the Barbarossa brothers and their successors carved a unique corsair state that drew revenue and political power from its naval warfare against Habsburg Spain. In the 17th century, when the wars between Spain and the Ottoman Empire, Kingdom of France, Kingdom of England and Dutch Republic ended, Barbary corsairs started capturing merchant ships and their crews and goods from these states. When the Ottomans could not prevent these attacks, European powers negotiated directly with Algiers and also took military action against it. This policy would emancipate Algiers from the Ottomans.

Ottoman Tunisia — also known as the Eyalet of Tunis or the Regency of Tunis — was a semi-autonomous territory of the Ottoman Empire, that existed from the 16th to the 19th century, located roughly in present-day Tunisia (and parts of what is now eastern Algeria.)

The Ottoman presence in the Maghreb began with the conquest of Algiers in 1516 by the Ottoman Turkish corsair, Beylerbey Aruj Barbarossa (Oruç Reis). In 1534, the Ottoman Navy under the command of Kapudan Pasha Hayreddin Barbarossa, Aruj's younger brother, captured Tunis from the Hafsid dynasty. Less than a year later, in 1535, the Holy Roman Emperor, Charles V sent a multinational invasion force to wrest control of Tunis, overwhelming the Ottoman garrison. Following the final Ottoman reconquest of Tunis from Spain in 1574, the Ottomans maintained control of Tunis for over three centuries. Ottoman rule came to an end following the French conquest of Tunisia in 1881.

Ottoman Tunisia — also known as the Eyalet of Tunis or the Regency of Tunis — was a semi-autonomous territory of the Ottoman Empire, that existed from the 16th to the 19th century, located roughly in present-day Tunisia (and parts of what is now eastern Algeria.)

The Ottoman presence in the Maghreb began with the conquest of Algiers in 1516 by the Ottoman Turkish corsair, Beylerbey Aruj Barbarossa (Oruç Reis). In 1534, the Ottoman Navy under the command of Kapudan Pasha Hayreddin Barbarossa, Aruj's younger brother, captured Tunis from the Hafsid dynasty. Less than a year later, in 1535, the Holy Roman Emperor, Charles V sent a multinational invasion force to wrest back control of Tunis, overwhelming the Ottoman garrison. Following the final Ottoman reconquest of Tunis from Spain in 1574, the Ottomans maintained control of Tunis for over three centuries. Ottoman rule came to an end following the French conquest of Tunisia in 1881.