Complex sentence: The British made northern Balochistan region part of Afghanistan to divide the strength of Baloch Nation which includes the Chahar Burjak District of Nimruz Province as well as the Registan Desert in southern Helmand and Kandahar provinces.
Split into simpler sentences: The British made northern Balochistan part of Afghanistan in order to divide the strength of the Baloch nation. The Afghan portion of Balochistan includes the Chahar Burjak District of Nimruz Province, and the Registan Desert in southern Helmand and Kandahar provinces.