ared ▁go ▁into ▁the ▁pla ins ▁to ▁h unt ▁buff alo ". ▁The ▁Si oux ▁would ▁stay ▁near ▁A rik ara ▁villages ▁" and ▁keep ▁the ▁b ison ▁away , ▁so ▁they ▁could ▁sell ▁meat ▁and ▁h ides ▁to ▁the ▁A rik ar as ". ▁ ▁In ▁ 1 8 6 6 , ▁the ▁P end ▁d ' O re illes ▁crossed ▁the ▁Rock y ▁Mountain ▁from ▁the ▁west , ▁just ▁to ▁be ▁attacked ▁by ▁Indian ▁fo es ▁as ▁they ▁entered ▁the ▁pla ins . ▁They ▁lost ▁ 2 1 ▁people . ▁The ▁be aten ▁hunting ▁party ▁returned ▁in ▁a ▁" hor rible ▁condition " ▁and ▁" all ▁nearly ▁fam ished ". ▁O ften , ▁the ▁attack ers ▁tried ▁to ▁capture ▁d ried ▁meat , ▁equipment ▁and ▁horses ▁during ▁a ▁fight . ▁ ▁L ack ▁of ▁horses ▁ow ing ▁to ▁ra ids ▁reduced ▁the ▁ch ances ▁for ▁se cur ing ▁an ▁am ple ▁amount ▁of ▁meat ▁on ▁the ▁hun ts . ▁In ▁ 1 8 6 0 , ▁the ▁Pon ca ▁lost ▁ 1 0 0 ▁horses , ▁while ▁the ▁Mand an ▁and ▁H id ats a ▁saw ▁the ▁enemy ▁disappear ▁with ▁ 1 7 5 ▁horses ▁in ▁a ▁single ▁ra id ▁in ▁ 1 8 6 1 . ▁ ▁L oss ▁of ▁aut onomy ▁ ▁Conf lic ts ▁between ▁the ▁b ison ▁hunting ▁tribes ▁r anged ▁from ▁ra ids ▁to ▁mass ac res . ▁Cam ps ▁were ▁left ▁without ▁leaders . ▁In ▁the ▁course ▁of ▁a ▁battle , ▁tip is ▁and ▁h