This lesson describes a geohistorical unit in which the students demonstrate their understanding of significant events in American history. The purpose of the lesson is for students to understand that the rapid population growth of the United States was made possible by the removal of Native Americans. In the first part of the lesson, students use the Natchez Trace ArcGIS Online map to learn about the federal treaties with Native American tribes. The lesson applies project-based learning activities to the learning of historical concepts within the larger curriculum, in addition to the C3 Framework for State Social Studies Standards (2013), the Texas Essential Knowledge and Skills (2011), and the Mississippi Social Studies Framework (2011). The lesson used ArcGIS Online mapping technology to promote inquiry and engagement as students examined the Native American journey to the west on what is now known as the Trail of Tears.