Congolese soldiers guard suspected M23 rebel fighters who surrendered in Chanzo village in the Rutshuru territory near the eastern town of Goma, Nov. 5. Democratic Republic of Congo's M23 rebel group on Tuesday called an end to a 20-month revolt after the army captured its last hilltop strongholds, raising hopes for peace in a region where millions have died in nearly two decades of violence. (Kenny Katombe/Reuters) #

A Congolese army soldier is welcomed by locals as the army enters Jomba, Congo, during its advance toward Bunagana through rebel-held territory. The Congolese army retook one of the last remaining strongholds of the M23 rebels. (Joseph Kay/Associated Press) #

FARDC governmental troops spokesman Olivier Amuli talks to Major Rebel officers Kake Boazi (R) and Lieutenant Claude Mirenge after they surrendered on Nov. 1, in the city of Bunagana, near the border with Uganda. (Junior D. Kannah/AFP/Getty Images) #

Suspected M23 rebel fighters sit in a group after surrendering to the Congolese army in Chanzo village in the Rutshuru territory near the eastern town of Goma, Nov. 5. (Kenny Katombe/Reuters) #

South African UN troops check out a burnt out tank, abandoned by M23 rebels on November 3 in Kimbumba. Democratic Republic of Congo's army on Monday pounded the remaining hilltop positions of M23 rebels in the country's troubled east despite a truce call by the beleaguered insurgents. (Junior D. Kannah/AFP/Getty Images) #

People displaced by fighting between the Congolese army and M23 rebels in Bunagana in the eastern Democratic Republic of Congo, make their way home after spending a night in the Ugandan town of Bunagana, Oct. 31. (James Akena/Reuters) #

A Congolese soldier shoots in the direction of M23 rebels from their position near the Rumangabo military base in Runyoni, north of Goma, October 31. Congo army said on Thursday it was hunting rebels deep in the forests and mountains along the border with Rwanda and Uganda, the insurgents' last hideouts after they were driven from towns they seized during a 20-month rebellion. (Kenny Katombe/Reuters) #

A child walks near a Democratic Republic of Congo Fardc regular army tank as soldiers fire heavy munitions nearby, in Rutshuru, on November 4, after the army recaptured the area from M23 rebels. (Junior D. Kannah/AFP/Getty Images) #

Families displaced by fighting between the Congolese army and M23 rebels in Bunagana in the eastern Democratic Republic of Congo, prepare dinner in a field with other displaced families in the Ugandan town of Bunagana, west of the capital Kampala, Oct. 31. (James Akena /Reuters) #

Congolese soldiers hold a position in their advance against the M23 rebels north of the eastern towm of Goma Nov. 4. (Kenny Katombe/Reuters) #

People displaced from fighting between Democratic Republic of Congo troops driving M23 rebels from one of their key hilltop positions gather on Nov. 4, in the eastern city of Rutshuru. (Junior D. Kannah/AFP/Getty Images) #

A man, displaced by fighting between the Congolese army and M23 rebels, erects a shelter in a field with other displaced families in the Ugandan town of Bunagana, west of capital Kampala, Oct. 31. (James Akena /Reuters) #

DR Congo Fardc governmental soldiers load a missile launcher outside Bunagana, close to the Uganda border on Oct. 31. (Junior D. Kannah/AFP/Getty Images) #

Democratic Republic of Congo Army soldiers stand on Nov. 5, on Chanzu hill, in the eastern North Kivu region that was one of the M23 rebels' last stands. (Junior D. Kannah/AFP/Getty Images) #

Internally displaced people gather at the Mbuzi hilltop near Rutshuru, on Nov. 4, as the army pursued a military operation to recapture the area from M23 rebels. (Junior D. Kannah/AFP/Getty Images) #

Human skulls and bones rest in a mass grave on in Kibumba, southwest of Goma on Nov. 7. According to a ministry statement the mass grave is one of three discovered the week before by the army during "mopping-up operations" containing "the bones of adults and children", after government troops fought fierce battles with the M23 rebel movement before taking control of most of the Kibumba region. (Junior D. Kannah/AFP/Getty Images) #

Some of 73 freed prisonners of the M23 rebels, including Democratic Republic of Congo Army soldiers and civilians, carry sardine cans given by the army on Nov. 5, as they arrive from Chanzu hill, in the eastern North Kivu region that was one of the M23 rebels' last stands. (Junior D. Kannah/AFP/Getty Images) #

Children stand beside a burnt out tank, abandoned by M23 rebels on Nov. 3, as UN forces patrol in Kimbumba. (Junior D. Kannah/AFP/Getty Images) #

Tanzanian UN troops patrol on Nov. 3, in Kimbumba. Democratic Republic of Congo's army on Monday pounded the remaining hilltop positions of M23 rebels in the country's troubled east despite a truce call by the beleaguered insurgents. (Junior D. Kannah/AFP/Getty Images) #

Democratic Republic of Congo Army soldiers raise the national flag on Nov. 5, in Bunagana, which had been the M23 rebel base, in the eastern North Kivu region. (Junior D. Kannah/AFP/Getty Images) #

A builder works on the frame of a new house for Emmanuel Kazingufu, back right, whose home was destroyed last August by a Congolese army mortar shell in fighting against M23 rebels, in Kibati, eastern Congo, Nov. 6. Now that the M23 rebels have officially given up their fight, 27-year-old Kazingufu is rebuilding his house. (Joseph Kay/Associated Press) #