Who were the leaders of the lewis and clark expedition besides lewis and clark?

hope this helps could not find any other leaders but found this: The Lewis and Clark Expedition began in 1804, when President Thomas Jefferson tasked Meriwether Lewis with exploring lands west of the Mississippi River that comprised the Louisiana Purchase. Lewis chose William Clark as his co-leader for the mission.

There were no other leaders in the Lewis and Clark expidition please tell me if I am wrong because I am curious if there were more leaders thanks :)

the united states didn't wanted to get involve with other countries probelms