Judge Bruno Cotte is to read the verdict at 0830 GMT in the case against Katanga, the one-time commander of the ethnic-based Patriotic Resistance Forces in Ituri (FRPI), operating in the DR Congo's mineral-rich northeast.
The verdict is only the ICC's third since opening its doors more than a decade ago. It is also the first time sexual violence charges featured in a trial.
Prosecutors allege that the man, once known as "Simba" (Lion), and his forces of the Ngiti and Lendu tribes attacked villagers of the Hema ethnic group with machine guns, rocket-propelled grenades and machetes, murdering around 200 people.
"The attack was intended to 'wipe out' or 'raze' Bogoro village...," the prosecution said.
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Child soldiers were used while women and girls were abducted afterwards and used as sex slaves, forced to cook and obey orders from FRPI soldiers.
He was transferred to The Hague in October 2007 and his trial, together with that of his co-accused Mathieu Ngudjolo Chui, started two years later.
Judges in November 2012 split the trials.
A month later Ngudjolo was acquitted after judges in that case said the prosecution failed to prove he played a commanding role in the Bogoro attack.
It was the first time the ICC, the world's only permanent independent tribunal to try the world's worst crimes, had acquitted a suspect.
He denied ever being present at time of the attack on Bogoro, 25 kilometres OGORAsouth of Ituri province's administrative capital Bunia, near Lake Albert.