[1] He was a typical representative of the German imperial system in which bishops (who couldn't inherit their lands) were the main officials of the empire.
William was appointed when a war was going on against West Frisia (later part of the county of Holland), which was resisting imperial authority.
The imperial army conquered large parts of West Frisia in 1061, when Dirk V became count.
Much of West Frisia was recovered by count Dirk after the death of bishop William in the same year.
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