<s>[INST] I am a teacher of a 7th grade social studies class. My students have been studying American History from the American Revolution to the present day. They have also studied geography and culture. To support their learning, I would like to have them participate in a simulation activity that challenges them to think critically about historical events and issues. The simulation activity should be focused on the topic of westward expansion and the treatment of Native American tribes during this time period. 

Here is the scenario: 

Welcome to the year 1845. The United States government has just passed the Mexican-American War, and the country is eager to expand its territory westward. You are a leader in a Native American tribe that has lived in the Great Plains region for generations. Your tribe has just received a visit from a government representative who is offering to "purchase" your land from you in exchange for a reservation and a promise of protection. 

The question is: what do you do?[/INST]