One of the Yazidi women abducted by Isis in 2014 has escaped the caliphate with her five-year-old son after spending four years as an Isis slave.

“He was terrified,” she said, recounting their escape this month. “I held his hand and we just kept walking.”

The walk to freedom lasted 53 hours, and the little boy cried all the way. It wasn't their first escape attempt – Faryal had tried five times before to flee Isis – but they would be shot on the spot if the militants caught them now.

They passed corpses in the darkness, and when exhaustion overwhelmed them, they huddled together and slept on the dusty path. Faryal whispered reassurances to her five-year-old son, telling him that his grandparents were waiting and that, after four years as prisoners of Isis, they were finally going home. He wouldn't believe her.

As members of Iraq's Yazidi minority, a largely Kurdish-speaking religious group, the pair had escaped what the UN has called a genocide.

Isis militants kidnapped thousands of Yazidis on a single day in August 2014, massacring the men and dumping them in mass graves, and forcing the women into sexual slavery.

During her captivity, Faryal said she had six different owners, at times being passed on when a fighter wanted a new sexual partner or simply to settle a debt. “Monsters who treated us like animals,” is how she described them.

The atrocities committed against the Yazidis had initially prompted the US to launch airstrikes against the militants and begin a military campaign to roll back Isis's caliphate that now, four years later, could end within days. US-backed forces have the last Isis holdouts surrounded in the eastern Syrian hamlet of Baghouz.

In photographs, taken by aid workers on the night of her escape, a male companion hides his face but Faryal looks straight out at the camera. Her hazel eyes are fixed in a quiet stare. Her son's face is wet with tears, and he is sobbing. “I can't put into words how I was feeling at that moment,” she said. “All I could think was: 'Please, take me away from here.' ”

Faryal, 20, told her story last week in the northern Syrian town of Amuda after being transferred there by the US-backed Kurdish forces that rescued them. Throughout the interview, she kept a watchful eye on Hoshyar, her son, pulling him close as he cried and then trying, without success, to make him laugh.

Details of her account were corroborated by members of her family in northern Iraq and through a team of Yazidi activists that had communicated with her secretly for months before the escape in attempts to smuggle her to safety.

The day before Faryal's life changed forever in 2014 had dawned like any other in the Iraqi village of Tel Banat. She pottered around the house looking after her infant son Hoshyar, she recalled. By midday, the sun was roasting, and although rumours had swirled for weeks that Isis forces were drawing closer, few in Tel Banat were aware of the coming storm.

The Islamist militants arrived at dusk.

“We couldn't run fast enough,” Faryal remembered, describing how she and 10 members of her extended family had piled into a car and joined an epic exodus. Yazidi towns and villages around Mount Sinjar in northern Iraq emptied within hours as more than 100,000 people fled to higher ground. Faryal and her husband, Hashem, made it only a few miles before militants blocked their path.

Yazidis have long faced persecution from more powerful religious groups for their beliefs, in part because of a false but commonly-held impression that they worship the sun, or the devil. There are fewer than one million Yazidis worldwide, and according to the UN, Isis had intended to entirely wipe out those within their reach.

Yazidi men and boys who had reached puberty were separated from the women and other children and often shot dead at roadsides. Women were bused to temporary holding sites and then sold to Isis fighters at slave markets.

Isis clerics had decided that having slaves was religiously sanctioned, institutionalising sexual violence across their caliphate. Women have reported being tied to beds during daily assaults. They were sold from man to man. Gang rape was common.

Many women and girls committed suicide in the opening months of captivity, according to Yazidi rights groups. Others harmed themselves to appear less appealing to fighters who might consider buying them.

Faryal recalled that an Isis fighter who was Iraqi and called himself Abu Kattab was her worst abuser. Hoshyar was abused, too, Faryal said. Abu Kattab beat him so badly there were hand prints on his face. Another had forced the boy's arm onto a hot plate.

“He was so small, but for some reason the fighters hated him,” Faryal said. “I could never explain to him why.”

Timeline of the Isis caliphate Show all 19 1 /19 Timeline of the Isis caliphate Timeline of the Isis caliphate ISIS began as a group by the merging of extremist organisations ISI and al-Nusra in 2013. Following clashes, Syrian rebels captured the ISIS headquarters in Aleppo in January 2014 (pictured) AFP/Getty Timeline of the Isis caliphate Abu Bakr Al-Baghdadi declared the creation of a caliphate in Mosul on 27 June 2014 Timeline of the Isis caliphate Isis conquered the Kurdish towns of Sinjar and Zumar in August 2014, forcing thousands of civilians to flee their homes. Pictured are a group of Yazidi Kurds who have fled Rex Timeline of the Isis caliphate On September 2 2014 Isis released a video depicting the beheading of US journalist Steven Sotloff. On September 13 they released another video showing the execution of British aid worker David Haines Timeline of the Isis caliphate The US launched its first airstrikes against Isis in Syria on 23 September 2014. Here Lt Gen William C Mayville Jnr speaks about the bombing campaign in the wake of the first strikes Getty Timeline of the Isis caliphate Isis militants sit atop a hill planted with their flag in the Syrian town of Kobani on 6 October 2014. They had been advancing on Kobani since mid-September and by now was in control of the city’s entrance and exit points AFP/Getty Timeline of the Isis caliphate Residents of the border village of Alizar keep guard day and night as they wait in fear of mortar fire from Isis who have occupied the nearby city of Kobani Getty Timeline of the Isis caliphate Smoke rises following a US airstrike on Kobani, 28 October 2014 AFP/Getty Timeline of the Isis caliphate YPG fighters raise a flag as they reclaim Kobani on 26 January 2015 VOA Timeline of the Isis caliphate Isis seized the ancient Syrian city of Palmyra on 20 May 2015. This image show the city from above days after its capture by Isis Getty Timeline of the Isis caliphate Kurdish forces are stationed on a hill above the town of Sinjar as smoke rises following US airstrikes on 12 November 2015 AFP/Getty Timeline of the Isis caliphate Kurdish forces enter Sinjar after seizing it from Isis control on 13 November 2015 AFP/Getty Timeline of the Isis caliphate Iraqi government forces make the victory sign as they retake the city of Fallujah from ISIS on 26 June 2016 Getty Timeline of the Isis caliphate Iraqi forces battle with Isis for the city of Mosul on 30 June 2017 AFP/Getty Timeline of the Isis caliphate Members of the Iraqi federal police raise flags in Mosul on 8 July 2017. On the following day, Iraqi prime minister Haider Al Abadi declares victory over Isis in Mosul Getty Timeline of the Isis caliphate Members of Syrian Democratic Forces celebrate in Al-Naim square after taking back the city of Raqqa from Isis. US-backed Syrian forces declare victory over Isis in Raqqa on 20 October 2017 after a four-month long campaign Getty Timeline of the Isis caliphate Female fighters of the Syrian Democratic Forces celebrate in Al-Naim Square after taking back the city of Raqqa from Isis. US-backed Syrian forces declare victory over Isis in Raqqa on 20 October 2017 after a four-month long campaign AFP/Getty Timeline of the Isis caliphate Trucks full of women and children arrive from the last Isis-held areas in Deir ez-Zor, Syria in January 2019 They were among the last civilians to be living in the ISIS caliphate, by this time reduced to just two small villages in Syria’s Deir ez-Zor Richard Hall/The Independent Timeline of the Isis caliphate Zikia Ibrahim, 28, with her two-year-old son and 8-month-old daughter, after fleeing the Isis caliphate, on Saturday 26 January 2019 Richard Hall/The Independent

As the boy sat beside his mother last week, his eyes moved slowly from side to side as if scanning the room for threats. His blond hair was cut in jagged chunks. He did not speak and he did not smile.

At its height in 2014, Isis's self-proclaimed caliphate covered territory in Syria and Iraq the size of Britain, and the movement drew recruits from around the world. In the intervening years, thousands of Yazidi women fled the territory held by the militants, but Faryal couldn't escape.

With each unsuccessful attempt to escape, the punishment grew harsher, she said. By 2017, she said, she had given up. Keeping her head down and accepting the abuse seemed the only way to keep Hoshyar alive, and the child was fraying badly. Their owners starved him and often forbade him to go to the toilet.

“I knew that if I fought back, they would take him from me forever,” she said. “They did that to so many women.”

There was one final act of resistance, though: a tattoo of her husband's name, inked in kohl and water on the back of her right hand. It took five days to complete, and the pain lasted even longer. It was, she sometimes told herself, a reminder of a life that could still be hers. At other times, she lost all hope.

In its final months, as the caliphate shrank to a sliver, her captors were moving weekly to outrun US airstrikes. But the US-backed Syrian Democratic Forces were closing in.

Food supplies ran so low that Faryal said she sometimes went days without eating, spending her money instead on small sandwiches for Hoshyar.

When the pair was struck by shrapnel in the Syrian hamlet of Baghouz in January, no medical care was available. The village clinic had been abandoned, left littered with empty drug packets and syringes.

“We were pushed out onto the street, still bleeding. There were no drugs left, and we saw people in the road being left for dead,” she said.

Their chance to escape came when several Isis fighters grew desperate and plotted to use Faryal and Hoshyar as their ticket out. After years of abusive behavior, the militants decided to style themselves as the Yazidis' guardians and surrender to the forces surrounding their last stronghold.

At 2.30pm one afternoon, they all set out from their tent in Baghouz. An Uzbek fighter and his family pushed the young mother out in front of them as they started down the dusty path. They walked for two days in the cold, following the only path out of what had once been the caliphate.

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At 8pm on the second day, they heard shouting. Beams from flashlights bounced off the sky. It was the US-backed soldiers.

Isis fighters raised their hands above their heads and cried out for mercy. They claimed that they were helping a Yazidi escape and had kept her safe, according to someone present at the screening point that night. The appeal fell on deaf ears, and the men were detained as Faryal and Hoshyar carried on walking.

It took three days for the pair to finally believe they might be free. They still fear that the extremists will come back for them.

“As long as I'm alive, I'll be scared of them,” Faryal said, tensing her shoulders as she gripped her tattooed hand with the other. “My spirit might be strong, but my mind will never rest.”