Complex sentence: The company rebranded itself as Air Mali on 15 May 2009, was forced to ground their McDonnell Douglas MD-83 and McDonnell Douglas MD-87 in July 2012 and decided to cease all operations following the civil war within Mali on December 27,2012.
Split into simpler sentences: The company rebranded itself as Air Mali on 15 May 2009. In July 2012, following the civil war within Mali, the airline was forced to ground their McDonnell Douglas MD-83 and McDonnell Douglas MD-87 aircraft, and decided to cease all operations on December 27,2012.