 During the French Revolutionary War, some twenty-one similar vessels were captured from the French (both naval vessels and privateers) and commissioned in the Royal Navy as gun-brigs.These assorted vessels did not constitute a single class, but as all were procured from the enemy during the French Revolutionary War they are here treated similarly.Commodore Sir Sidney Smith in "Tigre" took a flotilla of seven vessels at Acre on 18 March 1799.