I just got done reading Battlefields of Nebraska (Thomas Phillips, 2009, Caxton Press), and while it's a good read, Mari Sandoz of course did a more in-depth coverage in her own books sixty years ago.
I suspect Battlefields was meant more for the casual reader, than for the reader interested in the history of Nebraska.
I wasn't aware that at one time, Fort Atkinson in Nebraska, near present-day Omaha, was the largest American military facility.
I also wasn't aware that the presence of Native Americans in Nebraska was so scant and so transient. I always knew Native Americans were rare in this part of America, but wasn't aware they were that rare, a few thousand, and at times only a few hundred.
In 77,000 square miles.
Apparently the biggest internecine warfare occurred between the peace-loving Pawnees and the war-loving Sioux, the latter nearly wiping out, entirely, the former.
And that was before the white man came along.