Rooke received orders from the queen to sail to the relief of Nice and Villa Franca, which were threatened with a siege by the duke de Vendome; at the same time he was pressed by king Charles to execute a scheme upon Barcelona, projected by the prince of Hesse d'Armstadt, who declared his opinion, that the Catalonians would declare for the house of Austria, as soon as they should be assured of proper support and protection.
The ministry of England understanding that the French were employed in equipping a strong squadron at Brest, and judging it was destined to act in the Mediterranean, sent out sir Cloudesley Shovel with a considerable fleet, to watch the motions of the Brest squadron; and he was provided with instructions how to act, in case it should be sailed to the Mediterranean.

Meanwhile, sir George Rooke, in compliance with the entreaties of King Charles, sailed with the transports under his convoy to Barcelona, and on the eighteenth of May appeared before the city.
Next day the troops were landed by the prince of Hesse, to the number of two thousand, and the Dutch ketches bombarded the place; but by this time the governor had secured the chiefs of the Austrian party; and the people exhibiting no marks of attachment to king Charles, the prince re-embarked his soldiers, from an apprehension of their being attacked and overpowered by superior numbers.

On the sixteenth day of June, sir George Rooke, being joined by sir Cloudesley Shovel, resolved to proceed up the Mediterranean in quest of the French fleet, which had sailed thither from Brest, and which Rooke had actually discovered, in the preceding month, on their voyage to Toulon.

On the seventeenth day of July the admiral called a council of war in the road of Tetuan, when they resolved to make an attempt upon Gibraltar, which was but slenderly provided with a garrison.

Thither they sailed, and on the twenty-first day of the month the prince of Hesse landed on the isthmus with eighteen hundred marines; then he summoned the governor to surrender, and was answered, that the place would be defended to the last extremity.