William Clark had many roles in helping the Unites states develop before and after the expedition. Clark was not only an American explorer, but was also a soldier, Indian agent, and territorial governor. In the years following the expedition, Clark served in a militia and later as the governor of the Missouri Territory. Towards the end of his life, during the years 1822 through 1838, Clark served as a Superintendent of Indian Affairs.
Along with his many jobs, being an explorer was a major achievement for Clark. One thing Clark would say throughout the journey was, "Faith dare the soul to go further than it can see." Clark was very brave throughout the expedition and was constantly going beyond his comfort zone to gain the most possible out his journey. Due to his faith he was able to push his limits further than he would have ever imagined, allowing him to learn so much from the Corps of Discovery.