Which sioux leader led the forces that annihilated colonel george
a. custer and his men on june 25, 1876?

The famous Sioux Leader was the Sitting Bull, one of the most famous Native American leaders in history. Although the Native American army won, it was bad for them in the long run because the Government turned on them and so did the support of the majority of people and a definite establishment of reservations ensued.

Ithink your answer is b