Sitting Bull as hostiles those Sioux and others living off the reservation, Native Americans gathered at Sitting Bull's camp. He took an active role in encouraging this "unity camp". He sent scouts to the reservations to recruit warriors, and told the Hunkpapa to share supplies with those Native Americans who joined them. An example of his generosity was Sitting Bull's taking care of Wooden Leg's Northern Cheyenne tribe. They had been impoverished by Captain Reynold's March 17, 1876 attack and fled to Sitting Bull's camp for safety. Over the course of the first half of 1876, Sitting Bull's camp continually expanded, as
Sitting Bull the world. Two weeks later, after waiting in vain for other members of his tribe to follow him from Canada, the Army transferred Sitting Bull and his band to Fort Yates, the military post located adjacent to the Standing Rock Agency. This reservation straddles the present-day boundary between North and South Dakota. Sitting Bull and his band of 186 people were kept separate from the other Hunkpapa gathered at the agency. Army officials were concerned that he would stir up trouble among the recently surrendered northern bands. On August 26, 1881, he was visited by census taker William T. Selwyn,