After the expansion of Castillo San Felipe de Barajas was complete in the mid-17th century, it was armed with 63 cannons. Most of them are gone but a few remain along the upper bulwark next to a watch tower. These mortars were very effective against the British in 1741. The Spanish called it the Defeat of the British Armada. Although outnumbered by almost ten to one, the Cartagenans sunk six Royal Navy ships and damaged 17 others.
