The Worldwide issue:

In 1989, The UN had a meeting, where they discussed the rights that children should have.  It was called the United Nations Convention on the Rights of the Child.  In article 38, it was stated that states should do all they can to insure that all kids that are under the age of 15, are not able to provide service in any hostilities.  After the children turn 15, they are allowed to partake in warfare voluntarily.