sentences:  In 1158 Henry FitzRoy led a naval expedition in an attempt to 'assault' the Welsh under Owain Gwynedd, King of Gwynedd 'on both land and sea', on behalf of his Norman nephew, King Henry II.When FitzRoy's army landed at Ynys Môn, he torched the churches of Llanbedrgoch and Llanfair Mathafarn Eithaf.During Owain's men gathered together and the next morning fought and defeated the Norman army and killed Henry FitzRoy by a "shower of lances".