Complex sentence: In the years of 1628-1633 Osnabrück had been subjected by troops of the Catholic League and the Catholic Prince-Bishop Franz Wilhelm, Count of Wartenberg, imposed the Counter-Reformation onto the city with many Lutheran burgher families being exiled.
Split into simpler sentences: In the years of 1628-1633 Osnabrück had been subjugated by troops of the Catholic League. The Catholic Prince-Bishop Franz Wilhelm, Count of Wartenberg then imposed the Counter-Reformation onto the city with many Lutheran burgher families being exiled.