Complex sentence: Together, with Túrin wearing the Dragon-helm of Dor-lómin, he becomes again a captain against Morgoth, and the land where they dwell becomes known as the "Land of Helm and Bow".
Split into simpler sentences: Together, with Túrin wearing the Dragon-helm of Dor-lómin, he becomes again a captain against Morgoth. The land where they dwell becomes known as the "Land of Helm and Bow".