Complex sentence: The Second Congo War (1998--2003), which involved nine nations and led to ongoing low-level warfare despite an official peace and the first democratic elections in 2006, has often been referred to as, "Africa's World War".
Split into simpler sentences: The Second Congo War (1998--2003) involved nine nations and led to ongoing low-level warfare despite an official peace and the first democratic elections in 2006. It has often been referred to as "Africa's World War".