Cassard was an improved Téméraire class 74-gun ship of the line of the French Navy.

Under Commodore Gilbert-Amable Faure, she took part in the Atlantic campaign of 1806 in Willaumez' squadron, taking two prizes on the way.

In August, the 1806 Great Coastal hurricane caused her to separate from the rest of the fleet; she returned to Brest on 13 October.

During the battle, she attempted to escape into Rochefort harbour, ran aground, and was refloated by throwing part of her guns overboard.

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