François-Louis Teissèdre de Fleury (August 28, 1749–1799) was a French nobleman who joined the Royal Army in 1768 and later volunteered to fight in the Continental Army during the American Revolutionary War. In America he demonstrated his bravery at Piscataway in May 1777 after which he was appointed an officer of engineers. He fought at the Brandywine in September and was wounded at Germantown in early October. He served capably during the Siege of Fort Mifflin where he was wounded again in November. George Washington made him an assistant to Friedrich Wilhelm von Steuben at Valley Forge in the spring of 1778. He served during the Monmouth Campaign in June 1778 and fought in Rhode Island in August.