Complex sentence: After the capture of Bréville the Germans never seriously attempted to break through the airborne division's lines on again, and from then on the 6th Airborne Division was only subjected to sporadic artillery and mortar fire.
Split into simpler sentences: After the capture of Bréville, the Germans never seriously attempted to break through the airborne division's lines again. From then on, the 6th Airborne Division was subjected only to sporadic artillery and mortar fire.