Fortitude was a merchant vessel built in 1780 on the River Thames. A French frigate captured her in 1782 while she was on the return leg of her maiden voyage to India as an East Indiaman for the British East India Company (EIC). However, the British recaptured her in October 1782. The EIC purchased her and sent her back to England. There, in 1785, George Macartney Macauley purchased her and renamed her Pitt. She then performed five voyages for the British East India Company (EIC) between 1786 and 1798. In between, she made one journey transporting convicts from England to New South Wales. She was broken up in 1801.

The Battle of Porto Praya was a naval battle that took place during the American Revolutionary War on 16 April 1781 between a British squadron under Commodore George Johnstone and a French squadron under the Bailli de Suffren.