Under Article 8(2)(b)(xxvi) of the Rome Statute of the International Criminal Court (ICC), adopted in July 1998 and entered into force 1 July 2002; "Conscripting or enlisting children under the age of fifteen years into the national armed forces or using them to participate actively in hostilities" is a war crime.  
AND
 Article 38, proclaimed: "State parties shall take all feasible measures to ensure that persons who have not attained the age of 15 years do not take a direct part in hostilities." However, children who are over the age of 15 but under the age of 18 are still voluntarily able to take part in combat as soldiers
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