American explorer William Clark joined with his friend and fellow soldier Meriwether Lewis to explore the land west of the Mississippi River. The pair known as Lewis and Clark started the expedition in May 1804 and reached the Pacific Ocean in November 1805.
The goals of the group included understanding and mapping the geography of the Northwest. In the process, Lewis and Clark and their group of explorers forged relationships with many Indian nations and also made legal claims to the land.
William Clark was born Aug. 1,1770, in Caroline County, Virginia. He joined the Army at 19 years old. He eventually left the military to manage the family estate before setting out on his famous expedition.
His life after the expedition included marriage, a position as an agent for Indian affairs and governor of the Missouri Territory. Clark died on Sept. 1, 1838.