▁form ▁al li ances ▁with ▁foreign ▁r ul ers ▁and ▁took ▁every ▁opportunity ▁to ▁secure ▁the ▁reign ▁of ▁her ▁sons , ▁the ▁junior ▁du kes . ▁She ▁fe ared ▁that ▁they ▁would ▁be ▁re leg ated ▁from ▁their ▁positions ▁to ▁make ▁way ▁for ▁W ład ys ław ▁II ' s ▁sons , ▁the ▁young ▁B oles ław ▁and ▁his ▁brothers ▁M iesz ko ▁T angle foot ▁and ▁Kon rad . ▁ ▁The ▁conflict ▁er upt ed ▁in ▁ 1 1 4 1 , ▁when ▁Sal ome a ▁of ▁Berg , ▁without ▁the ▁knowledge ▁of ▁the ▁high ▁du ke , ▁decided ▁to ▁leave ▁the ▁land ▁of ▁Ł ę czy ca , ▁her ▁d ower , ▁to ▁her ▁sons ▁and ▁tried ▁to ▁give ▁her ▁young est ▁daughter , ▁Ag nes , ▁in ▁marriage ▁to ▁one ▁of ▁the ▁sons ▁of ▁Grand ▁Prince ▁V se vol od ▁II ▁Ol gov ich ▁of ▁K iev . ▁W ład ys ław ▁II ▁was ▁faster , ▁however , ▁and ▁he ▁gave ▁Grand ▁Prince ▁V se vol od ▁II ▁several ▁additional ▁political ▁advantages , ▁including ▁a ▁marriage ▁between ▁B oles ław ▁and ▁V se vol od ▁II ' s ▁daughter , ▁Z ven is lava , ▁which ▁took ▁place ▁in ▁ 1 1 4 2 . ▁ ▁T rip ▁to ▁Ruth enia ▁The ▁Polish - R uth en ian ▁al liance ▁soon ▁proved ▁to ▁be ▁extremely ▁important ▁in ▁the ▁struggle ▁between ▁W ład ys ław ▁II ▁and ▁the ▁Junior ▁D uk es . ▁The ▁final ▁conflicts ▁took ▁place ▁after ▁the ▁death