Which of the following statements is FALSE?
a. After the Adobe Walls Raid, Native Americans were not as organized against U.S. troops, and many of them were forced to move to reservations.
b. The Red River Campaign led by Sheridan and Sherman was largely unsuccessful as U.S. troops were cornered into a canyon and slaughtered.
c. Quanah Parker and other Native Americans felt that buffalo hunters were a major threat to their life on the plains and formed an alliance among several tribes to attack them.
d. Buffalo soldiers were African American soldiers who fought in the Civil War and were a major factor in the U.S. victory over Native American tribes on the frontier.