William Clark was known for the great Lewis and Clark Expedition. He was born on August 1,1770 in Caroline County, Virginia, and died on September 1, 1838. He lived with his father, William Clark III; his mother, Ann Rogers Clark; and his older brother, George Rogers Clark, who was Revolutionary war hero. At the age of nineteen, Clark entered the military. He first served in the militia and then entered the U.S. Army. Later on, he became friends with Meriwether Lewis while they both served in 1795. They year after that he was resigned from the army to become manager of his family’s estate. In 1803, Clark had received a letter from Lewis, inviting him to share command on an expedition to the west of the Mississippi River. The journey set off