The Osage had favored the Union by…
1865 CE
As a result, after the war, they are forced to make a new treaty with the United States during Reconstruction.
They are forced to give up more territory in Kansas to European-American settlers.
By a treaty in 1865, they cede another four million acres (sixteen thousand square kilometers) to the United States and are facing the issue of eventual removal from Kansas to Indian Territory. indi