During the War of Spanish Succession, which began in 1701, Gibraltar was besieged (1704) by a squadron commanded by Sir George Rooke and a land force of 1800 English and Dutch under Prince George of Hesse-Darmstadt; after three days the city was captured (24 July). The fortress had 100 cannon and ammunition, but a garrison of only 150 men; the inhabitants were reduced to 6000. After a bombardment of six hours the garrison surrendered.

Before a year had passed Spain endeavoured, with the help of France, to recapture Gibraltar. In this, the twelfth siege of Gibraltar, the attacking party had a great preponderance of numbers, but the fortress successfully resisted all their efforts to capture it. By a special decree of February, 1706, Queen Anne declared Gibraltar a free port. In 1713, by the Treaty of Utrecht, it became definitively a British possession, though many attempts were made by the Spaniards to regain it. The last siege, the fourteenth in its history, began 14 July, 1779, and continued for 3 years, 7 months, and 12 days. In April, 1782, the French and Spaniards again bombarded Gibraltar by land and sea, but without success. A peace was finally concluded by which Spain received the island of Minorca in place of Gibraltar. When the city was occupied by the English in 1704, the Spaniards carried away whatever they could and settled in the neighbouring district of San Rocco. Scarcely a dozen persons remained in Gibraltar. It was subsequently populated by people of every nation, especially by Genoese and Maltese, as is evident from the various family names. Spanish is generally spoken by the people, though English is the tongue of public administration.