The reservation era refers to a period in U.S. history, primarily in the 19th century, when Native American tribes were forcibly relocated to designated areas known as reservations. This era was marked by significant loss of land, cultural disruption, and the imposition of federal control over tribal affairs. The impact of this period is reflected in various forms of artistic expression, such as painting and ledger art, which document the experiences and struggles of Native Americans during this tumultuous time.