Complex sentence: Reformed after Arnhem, the regiment never fought in another battle, they did however take part in Operation Doomsday the repatriation of the German occupation army in Norway in May 1945.
Split into simpler sentences: Reformed after Arnhem, the regiment never fought in another battle. They did, however, take part in Operation Doomsday, the repatriation of the German occupation army in Norway in May 1945.