Take a look at your Oklahoma History, the state was divided into Oklahoma Territory [mostly on the east side of the state] and Indian Territory [mostly the western side of the state]. My grandparents were married in Indian Territory in 1899 and their first son born in Indian Territory in 1901. You did not have to be a Native American to be living in Indian Territory. 1880 would be during the time when some of the land rushes were already being started. LaDonna Hinch