The fortresses in the basin of the Po chiefly belong to the era of divided Italy and are now out of date; the chief coast fortresses are Vado, Genoa, Spezia, Monte Argentaro, Gacta, Straits of Messina, Taranto, Maddalena.
In 1807 the garrisons of the Black Sea forts at the entrance of the straits rose in rebellion, headed by one Kabakji Mustafa, and killed their officers.
Russia and Turkey thus regained full liberty as regards their naval forces and armaments in the Euxine; the passage of the straits remained interdicted to ships of war.
Turkey undertook to pay to Russia a war indemnity of 300,000,000 roubles, and the status of the straits remained unchanged.
Venice having adopted a hostile attitude since Turkey's conquests in the Morea, greater attention was devoted to the fleet; Mytilene was captured and the entrance to the straits fortified.