Vasanthi became a child soldier in Sri Lanka at the age of 10. She was one of hundreds of thousands of children who participate in armies and armed groups in more than 30 countries around the world. The problem is most critical in Africa, where up to 100,000 children are estimated to be involved in armed conflict. Child soldiers also exist in Sri Lanka, Afghanistan, Burma, India, Indonesia, Iran, Iraq, Israel and the Occupied Palestinian Territories, even though international law sets 18 as the minimum age for all participation in hostilities.