The action of 25 September 1806 was a naval battle fought during the Napoleonic Wars off the French Biscay port of Rochefort. A French squadron comprising five frigates and two corvettes, sailing to the French West Indies with supplies and reinforcements, was intercepted by a British squadron of six ships of the line that was keeping a close blockade of the port as part of the Atlantic campaign of 1806. The British ships, under the command of Commodore Sir Samuel Hood, spotted the French convoy early in the morning of 25 September, just a few hours after the French had left port, and immediately gave chase. Although the French ships tried to escape, they were heavily laden with troops and stores, and the strong winds favoured the larger ships of the line, which caught the French convoy aft