A former Congolese military leader nicknamed "Terminator" has been convicted of war crimes for atrocities such as murder, rape and conscripting child soldiers.
Fighters loyal to Bosco Ntaganda disembowelled babies and smashed their heads in, said judges at the International Criminal Court.
ICC judges convicted Ntaganda on 18 counts at The Hague on Monday.
He was found guilty for acts committed while he was the Union of Congolese Patriots militia chief in the east of the country from 2002 to 2003.
His lawyers had argued that Ntaganda was a victim himself, having been recruited as a child soldier.
Ntaganda's sentence will be determined at a later hearing.
The conviction is a rare success for prosecutors at the ICC, an international court set up to prosecute war crimes and crimes against humanity when its member states are unable or unwilling to do so.
He is the fourth person to be convicted by the ICC since its creation in 2002 and the first for sexual slavery.
Reading a summary of the ruling, Judge Robert Fremr said: "The chamber...having heard all the evidence mentioned by the parties, finds you as concerns count one, murder as a crime against humanity, guilty."
His lawyers argued that Ntaganda had sought to maintain discipline among his troops, punishing those that violated rules of war.
Ntaganda, in a dark blue suit, showed no emotion as the sentence was read out. He has 30 days to appeal.
In the conflict in Congo, Ntaganda's UPC, dominated by the Hema clan, targeted rival Lendu people for expulsion from the mineral-rich Ituri region.
Hundreds of civilians were killed and many thousands were forced to flee.
Ntaganda's boss, UPC leader Thomas Lubanga, is currently serving a 14-year prison sentence after his conviction at the ICC.
The court has also convicted one of their wartime opponents, Germain Katanga.
It has also convicted Ahmad al-Faqi al-Mahdi, a Malian who confessed to destroying cultural property and former Ivory Coast president Jean-Pierre Bemba - though Bemba's conviction was overturned on appeal.
A ICC warrant for Ntaganda's arrest was first issued in 2006 and he turned himself in at the US Embassy in neighbouring Rwanda in 2013, apparently having fled Congo due to infighting among military groups.
Judge Fremr paused at times during his summary to cite specific instances of acts Ntaganda was responsible for, such as his personal calls for children to join his forces, as well as killings by his men, including that of a pregnant woman who had been kept in a pit.
"Rape was common practice", he said, citing one incident of a girl as young as nine being raped by fighters under Ntaganda's command.
