The Corps of Discovery was a group of people who went on a big adventure a long time ago. They were led by a man named Meriwether Lewis and his friend William Clark. They were sent by the President of the United States to explore a big area called the Louisiana Territory.
The idea was to learn more about the land and the animals and the people who lived there. This was important because the United States wanted to expand to this area but they needed to know what was there first.
The Corps of Discovery included some soldiers who were good at shooting and hunting, some boatmen who were good at rowing, and an interpreter who knew how to speak with the native people they might meet. They also had some helpers like a cook and a dog.
The group traveled on boats and on foot for a very long time – over two years! They saw all kinds of amazing things like big mountains and wild animals like bears and buffalo. They also met new people, some who were friendly and some who were not.
The Corps of Discovery had to be really brave and work together to make it through this adventure. They had to learn new things and be flexible when they encountered challenges. In the end, they learned a lot about the land and the people and animals who lived there. This information helped the United States decide to buy the Louisiana Territory and eventually expand to the West.