Meriwether Lewis

The Treaty of Greenville was signed at Fort Greenville, Ohio, on August 3, 1795, following the Battle of Fallen Timbers.

The treaty was signed in Philadelphia by President George Washington and ratified by the Senate on December 22, 1795.

The keelboat for the expedition was built near Pittsburgh to Lewis's specifications and completed on August 31, 1803.

Lewis and his crew set sail from Pittsburgh on August 31, 1803, traveling down the Ohio River to meet Clark.

The Corps of Discovery departed Camp Dubois on May 14, 1804, under Clark's command, beginning the ascent of the Missouri River.

Sergeant Charles Floyd died on August 20, 1804, near present-day Sioux City, Iowa, marking the only death during the Lewis and Clark Expedition.

Sovereignty passed from Spain to France to the United States in St. Louis on March 10, 1804, finalizing the Louisiana Purchase.

Lewis and Clark reached the Great Falls on June 13, 1805, becoming the first white men to see them.

Meriwether Lewis crossed the Continental Divide at Lemhi Pass on August 12, 1805.

The expedition sighted the Pacific Ocean on November 7, 1805, and established Fort Clatsop.

The Corps of Discovery left Fort Clatsop on March 23, 1806, after a long winter, beginning the return journey home.

The expedition reached St. Louis, Missouri, on September 23, 1806, ending the six-month return voyage.

Historians have debated whether Lewis's death was suicide, homicide, or the result of illness and pain.

Meriwether Lewis died from gunshot wounds at Grinder's Stand on October 11, 1809, in a manner disputed as suicide or homicide.