"Monarch" was the scene of the execution of Admiral Sir John Byng, who had been sentenced to death for failing to do his utmost during the Battle of Minorca (1756), and was shot on "Monarch"s quarterdeck on 14 March 1757. "Monarch" went out to the Mediterranean during the last years of the Seven Years' War, and played a role in the British victory at the Battle of Cartagena. She returned home and was reduced to harbour service, and was finally sold for breaking up in 1760.