, ▁anno yed ▁at ▁the ▁X ion gnu ' s ▁constant ▁inc urs ions ▁against ▁the ▁northern ▁border , ▁the ▁Han ▁D ynast y ▁dispatch ed ▁four ▁columns , ▁commission ed ▁gener als ▁Dou ▁Gu ▁and ▁G eng ▁Ch ong ▁to ▁lead ▁an ▁army ▁against ▁the ▁X ion gnu ▁from ▁J iu qu an . ▁The ▁majority ▁of ▁this ▁expedition ▁only ▁had ▁minor ▁success es , ▁but ▁had ▁captured ▁the ▁Y iw ulu ▁area ▁in ▁this ▁battle . ▁ ▁After math ▁In ▁Y iw ulu , ▁Dou ▁Gu ▁set ▁up ▁an ▁agricult ural ▁g arrison , ▁and ▁appointed ▁a ▁commander ▁to ▁make ▁sure ▁that ▁the ▁army ▁station ed ▁in ▁the ▁Western ▁Reg ions ▁had ▁a ▁last ing ▁supply ▁of ▁prov isions . ▁In ▁the ▁same ▁year , ▁Dou ▁Gu ▁sent ▁Ban ▁Ch ao ▁and ▁Gu o ▁X un ▁along ▁with ▁ 3 6 ▁men ▁to ▁go ▁south . ▁Ban ▁Ch ao ▁successfully ▁organ ised ▁the ▁three ▁states ▁of ▁Sh ans han , ▁Y ut ian ▁and ▁Sh ule ▁against ▁the ▁X ion gnu , ▁rest oring ▁peace ▁and ▁order ▁in ▁the ▁Western ▁Reg ions . ▁Sub sequently , ▁in ▁ 7 4 , ▁the ▁Han ▁government ▁re est ab lished ▁the ▁Prote ctor ate ▁of ▁the ▁Western ▁Reg ions , ▁in ▁the ▁city ▁of ▁Jin man ▁at ▁the ▁state ▁of ▁North ▁J ush i . ▁In ▁ 7 5 , ▁on ▁the ▁death ▁of ▁the ▁short - re igned ▁Emperor ▁M ing ▁of ▁Han , ▁the ▁X ion gnu ▁with ▁its ▁al lies