Kurdish and Yezidi female fighters on the frontline with Isis, pictured here in Sinjar, Iraq, take a break to celebrate the birthday of Abdullah Ocalan, the founder of the Kurdistan Workers’ Party (PKK) – April 2016

Kurdish and Yezidi female fighters on the frontline with Isis, pictured here in Sinjar, Iraq, take a break to celebrate the birthday of Abdullah Ocalan, the founder of the Kurdistan Workers' Party (PKK) - April 2016

Kurdish and Yezidi female fighters on the frontline with Isis, pictured here in Sinjar, Iraq, take a break to celebrate the birthday of Abdullah Ocalan, the founder of the Kurdistan Workers’ Party (PKK) – April 2016