There are, of course, more than one group or individual to recruit child soldiers. The two most notorious, in my mind, are/were Charles Taylor in Liberia and Sierra Leone, and Joseph Kony, the leader of the so-called Lords Resistance Army, or LRA. The civil wars in those countries had drawn out for so long that the rebels were having a hard time finding manpower for the movement, so children are routinely abducted and brainwashed, then taught to kill. It is one of the more tragic events in recent African history.
In 2010, President Obama signed a bill making it a priority of the US government to apprehend Joseph Kony and bring him to justice. The activist group Invisible Children is solely dedicated to the liberation and education of former child soldiers and the refugees those rebels create.