The women took the extraordinary decision to leave behind their lives in Turkey and travel to Kurdistan, northern Iraq, to end the bloodshed of Yazidis being slaughtered there.

'When we heard ISIS were coming to Sinjar and killing women, we came to stop the humanitarian crisis,' Roza, 22, the youngest of the group, told MailOnline.

Dressed in her camouflage vest that holds her AK-47 magazines and up to six grenades, she described what had happened to Christian Yazidis there as 'a crime against humanity'.

'When ISIS came, we saw them take Yazidi females and enslave them,' Roza said.

The ethnic cleansing of Yazidis on Mount Sinjar started in August last year when ISIS raided villages and plundered communities.

They went into villages armed with guns and took men, women and children from their homes. Terrified, they were forced to stand in two separate lines, men on one side and women and children on the other.

The men were forced to renounce Christianity and pledge their allegiance to Islam.

Should they refuse, they were bundled into trucks and taken to killing fields on the edges of villages, forced to dig their own graves before being made to kneel and shot in the back of the head. 

The women and underage girls were often taken to cities such as Mosul and Raqqa and turned into sex slaves.

Speaking exclusively to MailOnline, Roza explained: 'They did this first of all to get rid of the Yazidis and convert them and second, to do bad things to their females.'

The genocide of Yazidis led US President Barack Obama to order air strikes against ISIS on August 7. But the women said that by then it was already too late.

Sat next to Roza is her experienced guerrilla 'commander', Deijly.

Deijly explained that they had heard from other fighters operating in the caves in Sinjar that ISIS massacred Yazidis four days before the US airstrikes, on August 3. 

'We smuggled ourselves there from Turkey on August 5,' Deijly, 29, said pointing in the direction they came from.

She said that the Yazidis were left defenceless after the Kurdistan Regional Government (KRG) and its troops, the Peshmerga, withdrew.

'We heard that the Peshmerga had withdrawn and we heard the children were dying on the mountain.' 

As the Sinjar tragedy unfolded, an estimated 40,000 refugees were stranded on the mountain with little water or supplies.

'It was a difficult journey from Turkey. When we came the temperatures were scorching, but we were trained for that,' said Deijly, who is originally from Istanbul.

The final member of their unit, Raparin, 26, who also 'smuggled' herself in from Turkey, told what happened when the women arrived on the battlefield.

'We were sometimes killing ten of them a day, in the beginning of the liberation of Sinjar,' she said from her vantage point overlooking the ISIS-controlled town of Bara on the western mountain slope in Sinjar.

Helped by American-led air strikes and joined by more Kurdish forces, they manage to secure a corridor to allow many of the stranded Yazidis to cross into Syrian territory.

'We are 'one' with the Yazidis and will fight ISIS to take revenge for the what has happened to the women,' Deijly said. 

The women are all members of the PKK, the Kurdistan Workers Party, an organization that has been fighting the Turkish government for decades and is classified as a terrorist organization by the US, NATO and Turkey. It's for that reason that they will reveal few details of their lives back home.

'Recep Tayyip Erdoğan [Turkey President] has never wanted to make an agreement with us, and other countries support him, and think the PKK are terrorists,' said Raparin of her home country.

Turkey has recently begun a bombing campaign against the PKK and ISIS in Iraq and Syria. 

(dailymail.co.uk)