Little Wolf (standing) and Dull Knife (sitting) were the war leaders of
the northern Cheyenne.  When the southern Cheyenne surrendered in 1875,
the government concentrated on uniting the two Indian tribes, primarily
because gold was discovered in the northern Cheyenne area of the Black
Hills in North Dakota.  But Little Wolf and Dull Knife proved difficult to
capture, even during the massive government retaliation for Little
Bighorn. Ultimately, they surrendered in 1877.  The soldiers forced them
to march from North Dakota south to Indian Territory (what is now
Oklahoma).  Though Little Wolf and Dull Knife escaped during the march, in
1879 they finally turned themselves in.