M23, which refers to the March 23, 2009, accord that ended a previous Tutsi-led revolt in eastern Congo, is the latest group of ethnic Tutsi-led insurgents to take up arms against Congolese forces.
The Rwanda-backed M23 armed group has been advancing across the Democratic Republic of Congo's volatile east, which has been the scene of numerous infectious disease outbreaks.
While North Korea is widely acknowledged as one of the world's most constraining dictatorships, there is a country that has been dubbed "Africa's North Korea".