Civil disorder, also known as civil disturbance, civil unrest, or social unrest is a situation arising from a mass act of civil disobedience (such as a demonstration, riot, strike, or unlawful assembly) in which law enforcement has difficulty maintaining their authority.
Civil unrest flared up in Nigeria in 1993, in an unprecedented civilian challenge to the military following the rejection of the presidential election results by the Nigerian military leader Ibrahim Babangida.