I found this online so I hope it can help you but don't copy word for word because it's not my words and I don't know if it's accurate
"The Corps of Discovery were excellent goodwill ambassadors, befriending over 40 tribes while engaging only one in hostilities. The Corps carried a large supply of peace medals, beads, and certificates to help them accomplish this goal. They also recorded valuable information about the tribes and their cultures."
Also I have attached the article link so you can see for yourself
