Two years later, in 1780, the Virginia General Assembly approved the town charter of Louisville. The city was named in honor of King Louis XVI of France, whose soldiers were then aiding Americans in the Revolutionary War. Early residents lived in forts to protect themselves from Indian raids, but moved out by the late 1780s. In 1803, explorers Meriwether Lewis and William Clark organized their expedition across America in the town of Clarksville, Indiana at the present-day Falls of the Ohio opposite Louisville, Kentucky.