In an african bushwar , an army of childsoldiers is unfortunatly the wisest choice strategywise.
They are easy to "recruit", require little supplies or salaries, have not yet developed a sound moral compass,easily trained and motivated.
And they are agile,fast and move easily where grown men have difficulties.
The idea that people in that region will be deterred from using childsoldier because of facing a trial some time in the future is a bit weak. But might be a start.....