Complex sentence: Its narrowest point is Ali Masjid, where the Battle of Ali Masjid occurred.The para-military organization the Khyber Rifles originated in the area and took their name from it.
Split into simpler sentences: Its narrowest point is Ali Masjid, where the Battle of Ali Masjid occurred. The Khyber Rifles paramilitary organization originated in the area and took their name from it.