USA HISTORY

Detailed explanation-1: -three years (1804–06), taking the Corps of Discovery, as the expedition party was known, down the Ohio River, up the Missouri River, across the Continental Divide, and to the Pacific Ocean.

Detailed explanation-2: -The Corps was led jointly by Captain Meriwether Lewis and Second Lieutenant William Clark. Commissioned by President Thomas Jefferson, the Corps’ objectives were scientific and commercial – to study the area’s plants, animal life, and geography, and to learn how the Louisiana Purchase could be exploited economically.

Detailed explanation-3: -Their voyage covered more than 8, 000 miles in less than two-and-a-half years. It had resounding effects throughout American science and history, and disrupted the lives of countless Native Americans throughout North America.

Detailed explanation-4: -In 1803, Jefferson commissioned the Corps of Discovery and named Army Captain Meriwether Lewis its leader, who then invited William Clark to co-lead the expedition with him.