The ISIS militants are seemed to be in danger as the young Yazidis on Mount Sinjar in Iraq and Ayyub Faleh al-Rubaie, popularly known as "Angel of Death" and "Iraq's Rambo," prepare to match Islamic State's brutality as they plan to retaliate against the vicious terrorists.

Before delving deeper into the planned revenge of the Yazidis, the U.S. military has moved a female detainee who was seized during a raid on ISIS over to Iraqi Kurdish custody after almost three months of holding her in inconspicuous custody for interrogation.

Since an eastern Syria raid on May 15 that led to the capture of Umm Sayyaf, an Iraqi national who was the first detainee held by the U.S. in its year-long battle against ISIS, the Pentagon had remained mum about its plans for her. However, on Thursday, The Guardian reported the Pentagon announced that the detainee, whose real man is Nasrin As'ad Ibrahim, is currently being held by the interior ministry of the semi-autonomous Kurdistan Regional Government.

Even though several reports have said that the U.S. military has been interrogating Sayyaf, the Pentagon still referred to her only as a "suspected" member of ISIS, which sparked doubts about how fruitful or valuable such interrogation has proven. Meanwhile, it remains unclear why the American authorities turned Sayyaf over to Iraqi Kurdish custody instead of the Iraqi government since Pentagon officials did not give any explanations of the decision.

In other news, the young Yazidis, both male and female, have formed into what they called the Sinjar Protection Units or YBS. According to The Daily Beast, they have sworn to defend their homeland and to take vengeance against ISIS' crusade of rape, kidnapping and murder.

At the beginning of August 2014, the ISIS militants carried out their assaults on the Yazidis where thousands of Yazidi men were executed and women were sold as jihadist slaves. But now, dressed in khaki fatigues and woodland camouflage vests, the YBS fighters vowed to protect their people against the brutality of ISIS and to fight for humanity.

Aside from the YBS fighters, Ayyub Faleh al-Rubaie, best known as Abu Azrael ("Angel of Death") and "Iraq's Rambo," has become the hero in defending the nation and its people against ISIS. Al-Rubaie, a legendary Shia militiaman whose bravery and reputation made him the people's champ, can match the ruthlessness of the Islamic State through his fighting methods appearance.

As a matter of fact, he was seen holding axes, waving swords and abusing ISIS fighters' corpses. He has also coined his own slogan against ISIS jihadists which is "Illa Tahin" or "grind you into dust," Business Insider revealed.