Complex sentence: After this, Ironside was promoted to Field Marshal and raised to the peerage as Baron Ironside; he retired to Morley Old Hall in Norfolk to write, and never again saw active service or held an official position.
Split into simpler sentences: After this, Ironside was promoted to Field Marshal and raised to the peerage as Baron Ironside. Lord Ironside retired to Morley Old Hall in Norfolk to write, and never again saw active service or held any official position.