BAGHDAD — In the steamy Baghdad night, sweat poured down the faces of the Iraqi teens as they marched around a school courtyard, training for battle Daesh (the so-called IS) group. This is summer camp in Iraq, set up by the country's largest paramilitary force after Iraq's top Shiite cleric issued an edict calling on students as young as middle-school age to use their summer vacations to prepare to fight the Sunni extremists. These young fighters could have serious implications for the US-led coalition, which provides billions of dollars in military and economic aid to the Iraqi government. The Child Soldiers Prevention Act of 2008 says the United States cannot provide certain forms of military support, including foreign military financing and direct commercial sales to governments that recruit and use child soldiers or support paramilitaries or militias that do. Hundreds of students have gone through training at the dozens of such camps run by the Popular Mobilization Forces, the government-sanctioned umbrella group of mostly Shiite militias. It is impossible to say how many went on to fight Daesh, since those who do so go independently. But this summer, The Associated Press saw over a dozen armed boys on the front line in western Anbar province, including some as young as 10. Of around 200 cadets in a training class visited by the AP this month, about half were under the age of 18, with some as young as 15. Several said they intended to join their fathers and older brothers on the front lines. Dressed in military fatigues, 15-year-old Asam Riad was among dozens of youths doing high-knee marches at the school, his chest puffed out to try to appear as tall as the older cadets. "We've been called to defend the nation," the scrawny boy asserted, his voice cracking as he vowed to join the PMF. "I am not scared because my brothers are fighting alongside me." Another 15-year-old in the class, Jaafar Osama, said he used to want to be an engineer when he grows up, but now he wants to be a fighter. His father is a volunteer fighting alongside the Shiite militias in Anbar and his older brother is fighting in Beiji, north of Baghdad. "God willing, when I complete my training I will join them, even if it means sacrificing my life to keep Iraq safe," he said. It's yet another way minors are being dragged into Iraq's brutal war as the military, Shiite militias, Sunni tribes and Kurdish fighters battle to take back territory from Daesh militants who seized much of the country's north and west last year. The Sunni extremists have aggressively enlisted children as young as 10 for combat, as suicide bombers and as executioners in their horrifying videos. This month, Human Rights Watch said that Syrian Kurdish militias fighting the militants continue to deploy underage fighters. But the line between combat training and actually joining combat is blurry, and it is weakly enforced by the Popular Mobilization Forces. Multiple militias operate under its umbrella, with fighters loyal to different leaders who often act independently. At the training camp in a middle-class Shiite neighborhood of western Baghdad earlier this month, the young cadets spoke openly of joining battle in front of their trainers, who did nothing to contradict them. Neighborhood youths spent their evenings in training every night during the holy month of Ramadan, which ended in mid-July, with mock exercises held every few days since then for those who wish to continue. The boys ran through the streets practicing urban warfare techniques, since the toughest battles with the Daesh group are likely to involve street fighting. They were taught to hold, control and aim light weapons, though they didn't fire them. They also took part in public service activities like holding blood drives and collecting food and clothing. Earlier this summer, at one of the hottest front lines, near the Daesh-held city of Fallujah in western Anbar province, the AP spoke to a number of young boys, some heavily armed, among the Shiite militiamen. Baghdad natives Hussein Ali, 12, and his cousin Ali Ahsan, 14, said they joined their fathers on the battlefield after they finished their final exams. Carrying AK-47s, they paced around the Anbar desert, boasting of their resolve to liberate the predominantly Sunni province from Daesh militants. "It's our honor to serve our country," Hussein Ali said, adding that some of his schoolmates were also fighting. When asked if he was afraid, he smiled and said no. Iraq has a long history of training underage fighters. Under Saddam Hussein, boys 12 through 17 known as "Saddam's lion cubs" would attend training during summer breaks with the goal of eventually merging them into the Fadayeen — a paramilitary force loyal to Saddam's Baathist regime. — AP