The guilty verdict against Lubanga will draw new attention to pending cases against 20 other indictees, including Ugandan warlord Joseph Kony, the focus of Invisible Children's Kony2012 video campaign.
The Congolese ex-militia leader is the first man to stand trial at the International Criminal Court. Back home, some defend their native son as simply protecting his people.
In 2003, a reporter listened as the militia commander denied that he employed children.
Our correspondent remembers Mathieu Ngudjolo as 'disconcertingly reasonable.'