Complex sentence: After the Norman conquest in 1066, the Harrying of the North brought destruction, and the Normans did not reach Carlisle until 1092, so much of the area was not included in the Domesday Book.
Split into simpler sentences: After the Norman conquest in 1066, the Harrying of the North brought destruction. The Normans did not reach Carlisle until 1092, so much of the area was not included in the Domesday Book.