River and then into the Pacific 28 People and Their Environments 6. Look at map C and picture A. In the second column, write whether the Indian nation lived in the Great Plains or Rocky Mountains. (See pages 114-115 if you need help finding the Great Plains.) In the third column, write whether they lived in Louisiana Territory or Oregon Country. Territory Indian Nation Natural Region Nez Perce Oto Shoshone Mandan NYSTROM Education