User blog comment:Manofgod/Genghis Khan vs Red Cloud/@comment-17814994-20171115093205/@comment-3977304-20171121061116

You shouldn't be comparing Red Cloud's achievement of defeating the United States to Genghis Khan's achievement of conuering China and Persia. The U.S. was already weakened due to the aftermath of the Civil War during Red Cloud's time so it wasn't that difficult to defeat.