This however should come as no surprise giving the group’s endorsement of slavery, so much so it even released a fatwa guiding the sexual rights it’s members have over captured female slaves.

What is even more worrying is the army it is building with the children born under it's rule. Fresh minds molded from the infancy, indoctrinated from birth with ideologies the group propagates, exposed to violence from birth until they lack human sympathy, making them the perfect killing machines.

“This is one of the gravest situations on earth,” says Benotman. “Children are the key to the future. Indoctrination in Islamic State begins at birth, and increases in schools and training camps. Children are instructed in a particular interpretation of shari’a, desensitised to violence, and learn specific skills to take up the banner of jihad.”

This report comes after the surfacing of footage of an ISIS orphanage in Mosul, Iraq, which showed children dancing before cutting to a group of children being trained in military drills in the same compound. A training site, for the next set of Islamic jihadists.

A member of the sect could be heard in a voiceover on the video: "It is part of the Islamic State's duty to care for the children martyrs, that is why we have set up orphanages like this one."

These children are often used by ISIS to carry out executions, suicide bombings and the likes. The report states that in the last six months, Islamic State propaganda depicts 12 child executioners, and one child participating in a public execution.