Given the question: What type of details about bryachislav of polotsk can be gathered from the following bio? Bio: bryachislav izyaslavich -lrb- , -rrb- -lrb- c. 997 -- 1044 -rrb- was the prince of polotsk between 1001 and 1044 . his name , possibly , may have been of something in approximation to vratislav or wroclaw . he was son of izyaslav vladimirovich . during his reign polotsk was at war with kiev and novgorod . in 1015 he has inherited the city of lutsk after the death of his grandfather vladimir i of kiev . bryachislav izyaslavich was born in polotsk . either upon his father 's death in 1001 or his minor brother vseslav 's in 1003 , he inherited the principality of polotsk , himself being a child at this time -lrb- his grandparents married about 978 -rrb- . under his rule , polotsk attempted to distance itself from kiev . tensions were exacerbated by the fact that , under the east slavic house law , since izyaslav predeceased his father and never reigned in kiev , his descendants from the house of polotsk forfeited their dynastic rights to the kievan throne being classified as izgoi -lrb- outcast -rrb- . in 1020 bryachislav managed to sack novgorod , but on his way back he was confronted by an army of his uncle , yaroslav the wise . bryachislav suffered a defeat during the battle on the sudoma river and fled , leaving behind his novgorodian prisoners and loot . yaroslav chased him down and forced him to sign a peace agreement in 1021 , granting him only two cities of usvyat and vitebsk . despite this peace agreement , the hostilities between bryachislav and yaroslav continued for years . eventually he extended the territory of his principality and established the city of braslaw . the name of his spouse or consort is unknown and he had at least one son , vseslav of polotsk , who was the ancestor of all the following polotsk princes and the only one of them to rule in kiev . bryachislav died in polatsk in 1044 .
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