These are monuments to the Buffalo Soldiers, a black regiment formed in 1866 that slaughtered native
Americans.

http://www.kansassampler.org/siteassets/junc4.jpg

http://www.kansastravel.org/05fortleavenworth1.JPG

http://swabuffalosoldiers.org/wp-con...ca652b4b43.jpg

....and many more.

Surely these monuments cause as many hard feelings among Native Americans as do the Confederate
monuments cause to African Americans.