From Now Lebanon (August 18):
In July 2014, Hezbollah buried a 16-year-old fighter, Muhammad Ali Hussein Awada, who had been killed fighting Syrian opposition militants in the mountainous Lebanese-Syrian border zone. The revelation of his age, observers noted at the time, implied the Party of God – straining to hold larger swathes of territory with fewer men – had abandoned its former requirement that all fighters sent into live combat be at least 18 years of age.Besides violating international law, this indicates that Hezbollah needs to recruit children to keep its Syria adventure from collapsing.
Since then, evidence of Hezbollah sending children – defined by the UN Convention on the Rights of the Child as all people under 18 – to the frontlines of the war in Syria has mounted steadily. The pro-Hezbollah website SouthLebanon.org, which publicizes funerals of the militia's fighters killed "in confrontation with the mercenaries of disbelief and Wahhabism" – a reference to Sunni militants – has to date published photos of over two dozen "mujahideen martyrs" who appear likely to have been under 18 (see above image).
When the case of one obviously juvenile fatality, that of 15-year-old Mashhoor Shams al-Din, came to light in April 2015, the Party issued a statement denying he was killed fighting in Syria, claiming instead that he succumbed to a "saddening accident" in south Lebanon. Syrian opposition activists had asserted he was killed fighting in Syria's Qalamoun region; the same place 16-year-old Awada was killed the previous year.
Then again, now that Russia seems poised to help Syria's regime and Iran will be flush with cash to pay Hezbollah terrorists, this might change.