The British warship HMS Leopard pursued and attacked the American frigate USS Chesapeake (pictured) in the belief that the crew of the latter included deserters from the Royal Navy.

HMS Leopard was a 50-gun Portland class fourth rate of the Royal Navy. She served during the French Revolutionary and Napoleonic Wars, and was notable for the actions of her captain in 1807, which were emblematic of the tensions that later erupted in the War of 1812 between Britain and America. She was wrecked in 1814.

The Chesapeake–Leopard affair was a naval engagement off the coast of Norfolk, Virginia, on June 22, 1807, between the British fourth-rate HMS Leopard and the American frigate USS Chesapeake. The crew of Leopard pursued, attacked, and boarded the American frigate, looking for deserters from the Royal Navy. Chesapeake was caught unprepared and after a short battle involving broadsides received from Leopard, the commander of Chesapeake, James Barron, surrendered his vessel to the British. Chesapeake had fired only one shot.

A frigate is a type of warship. In different eras, the roles and capabilities of ships classified as frigates have varied.

Chesapeake was a 38-gun wooden-hulled, three-masted heavy frigate of the United States Navy. She was one of the original six frigates whose construction was authorized by the Naval Act of 1794. Joshua Humphreys designed these frigates to be the young navy's capital ships. Chesapeake was originally designed as a 44-gun frigate, but construction delays, material shortages and budget problems caused builder Josiah Fox to alter his design to 38 guns. Launched at the Gosport Navy Yard on 2 December 1799, Chesapeake began her career during the Quasi-War with France and later saw service in the First Barbary War.