Eastern D.R. Congo has fallen into chaos since March 2012. Gen. Bosco Ntaganda and Col. Sultani Makenga defected from FARDC successively，and then established M23 Movement in May 2012. The rebels settled in the area of the triple frontier of the D.R.Congo，Rwanda and Uganda，Which has displaced about 500，000 people. M23 occupied Goma in November 2012，which astonished the international community. The issue of the identity of Congolese Tutsis，conflicts of interest behind ethnic groups，regional security issues，and the failure of Congolese nation-state process are sources of the constant conflict in Eastern D.R. Congo in recent years.