Details of Sarah Nita (the story)

This book took place in northwestern New Mexico in the late 19th century. When Sarah Nita and her sister found their mommy, they were at Fort Sumner in southeast NM. They were at Fort Sumner because the Union Soldiers forced the Navajos to go there by walking. A lot of Navajos died along the way. Sarah Nita told the story of The Long Walk (the walk to Fort Sumner) to her daughter. Those are the details.