Which military action was Lieutenant Stephen Decatur directly responsible for?

Lieutenant Stephen Decatur is best known for his role in destroying the captured USS Philadelphia during the First Barbary War. When the Philadelphia was seized by the Tripolitans in 1803, Decatur led a daring nighttime raid to burn the ship, ensuring it could not be used against American forces. This action not only protected American interests but also displayed naval prowess and resolve against piracy, significantly bolstering morale and reinforcing U.S. naval reputation.

The other military actions listed, such as seizing enemy ships, engaging in blockades, or conducting ground assaults, while part of naval operations, do not specifically connect to Decatur's notable achievements. His legacy is particularly tied to the boldness and importance of his mission to destroy the Philadelphia, making it the defining action he is remembered for.