▁the ▁government . ▁The ▁coup ▁gained ▁the ▁support ▁of ▁L esser ▁Poland , ▁which ▁was ▁master ed ▁by ▁Cas imir ▁and ▁shortly ▁afterwards ▁Gre ater ▁Poland ▁s ided ▁with ▁Od on . ▁ ▁B oles ław , ▁however , ▁suffered ▁a ▁sudden ▁and ▁surprising ▁defeat ▁at ▁the ▁hands ▁of ▁his ▁brother ▁M iesz ko ▁and ▁his ▁son ▁Jar os ław ▁who ▁had ▁al lied ▁with ▁M iesz ko ▁III . ▁This ▁left ▁the ▁way ▁free ▁for ▁Cas imir ▁II ▁to ▁be ▁proc laimed ▁High ▁Duke , ▁and ▁B oles ław ▁again ▁had ▁to ▁escape ▁to ▁Germany . ▁Thanks ▁to ▁the ▁med iation ▁of ▁Cas imir ▁II , ▁B oles ław ▁returned ▁to ▁his ▁Duch y ▁without ▁major ▁troubles ▁in ▁ 1 1 7 7 ; ▁however , ▁he ▁suffered ▁a ▁further ▁dimin ution ▁of ▁his ▁authority ▁when ▁he ▁was ▁comp elled ▁to ▁give ▁G ł og ów ▁to ▁his ▁young est ▁brother ▁Kon rad . ▁ ▁Ret irement ▁from ▁political ▁affairs ▁After ▁this ▁defeat , ▁B oles ław ▁retired ▁from ▁the ▁Polish ▁political ▁scene ▁and ▁concentr ated ▁his ▁efforts ▁on ▁the ▁rule ▁over ▁his ▁du chy . ▁His ▁brother ▁Kon rad ' s ▁death ▁without ▁issue ▁in ▁ 1 1 9 0 ▁resulted ▁in ▁the ▁return ▁of ▁G ł og ów ▁to ▁his ▁domains . ▁ ▁During ▁the ▁last ▁years ▁of ▁his ▁reign , ▁B oles ław ▁devoted ▁himself ▁to ▁economic ▁and ▁business ▁activity . ▁Col on ization , ▁initially ▁from ▁poor ▁German ▁areas , ▁substantial ly ▁acceler ated ▁the ▁economic ▁development ▁of