The M23 is ostensibly led by Sultani Makenga, who is loyal to a former CNDP leader, Laurent Nkunda.

ECONOMIST: Rebel allies of Rwanda are making rapid inroads

Kigali has been, one can safely argue, the sole shareholder in the M23 militia gang, and its elder sisters CNDP and RCD-Goma.

CNN: How Obama can end Congo conflict

Congo agreed to take the CNDP militia into the national army.

WSJ: U.N. Peacekeepers at War in the Congo

The U.N. envoy praised representatives from the Congolese government and the main rebel group, the National Congress for the Defense of the People (CNDP), for taking part in the talks.

CNN: Congo peace talks open with U.N. plea

Tensions persist within the newly integrated forces of the Congolese army, which include a powerful Tutsi militia, called the National Congress for the Defence of the People (CNDP), that may retain its old command structure inside Congo's army.

ECONOMIST: Strife in eastern Congo