HMS Swiftsure was a 70-gun third rate ship of the line

Ship of the line

A ship of the line was a type of naval warship constructed from the 17th through the mid-19th century to take part in the naval tactic known as the line of battle, in which two columns of opposing warships would manoeuvre to bring the greatest weight of broadside guns to bear...

 of the Royal Navy

Royal Navy

The Royal Navy is the naval warfare service branch of the British Armed Forces. Founded in the 16th century, it is the oldest service branch and is known as the Senior Service...

, built at Deptford Dockyard to the draught specified by the 1745 Establishment

1745 Establishment

The 1745 Establishment was the third and final formal establishment of dimensions for ships to be built for the Royal Navy. It completely superseded the previous 1719 Establishment, which had subsequently been modified in 1733 and again in 1741...

, and launched on 25 May 1750.

She served in the Seven Years War, taking part in the capture of Le Foudroyant by HMS Monmouth

HMS Monmouth (1667)

HMS Monmouth was a 66-gun third-rate ship of the line of the Royal Navy, and was the second ship to be named for the town of Monmouth in Wales. She served from 1667 to 1767, winning ten battle honours over a century of active service...

 in 1758. In 1759 she was with Admiral Boscawen

Edward Boscawen

Admiral Edward Boscawen, PC was an Admiral in the Royal Navy and Member of Parliament for the borough of Truro, Cornwall. He is known principally for his various naval commands throughout the 18th Century and the engagements that he won, including the Siege of Louisburg in 1758 and Battle of Lagos...

 at Lagos, and at Quiberon Bay

Battle of Quiberon Bay

The naval Battle of Quiberon Bay took place on 20 November 1759 during the Seven Years' War in Quiberon Bay, off the coast of France near St. Nazaire...

 later that year, and at the capture of Belle Île

Belle Île

Belle-Île or Belle-Île-en-Mer is a French island off the coast of Brittany in the département of Morbihan, and the largest of Brittany's islands. It is 14 km from the Quiberon peninsula.Administratively, the island forms a canton: the canton of Belle-Île...

in 1761.

She was sold on 2 June 1773.