John Taylor leaves Boone County, moving to Gallatin County.

Explorers Lewis and Clark begin their famous journey with several stops in Kentucky.

U.S. President Thomas Jefferson dispatches pioneers Lewis and Clark to explore the newly acquired Louisiana Territory. The success of their expedition helps open the Trans-Mississippi West to settlement.

U.S. Vice President Aaron Burr mortally wounds former Treasury Secretary Alexander Hamilton in a duel.

Boone County Tax Lists, 1804.