Tents where displaced Yazidi families live are seen near Sinjar, March 13, 2015. Women fighters at a Kurdistan Workers Party (PKK) base on Mount Sinjar in northwest Iraq, just like their male counterparts, have to be ready for action at any time. Smoke from the front line, marking their battle against Islamic State, which launched an assault on northern Iraq last summer, is visible from the base. Many of the women have cut links with their families back home; the fighters come from all corners of the Kurdish region. (Reuters Photo/Asmaa Waguih)

Damaged cars lie at the side of a road leading to the Sinjar mountains, March 12, 2015. Women fighters at a Kurdistan Workers Party (PKK) base on Mount Sinjar in northwest Iraq, just like their male counterparts, have to be ready for action at any time. Smoke from the front line, marking their battle against Islamic State, which launched an assault on northern Iraq last summer, is visible from the base. Many of the women have cut links with their families back home; the fighters come from all corners of the Kurdish region. (Reuters Photo/Asmaa Waguih)

Haval Raperin, a member and leader of a group of Kurdistan Workers Party (PKK) fighters combs her hair at a base in Sinjar, March 11, 2015. Women fighters at a Kurdistan Workers Party (PKK) base on Mount Sinjar in northwest Iraq, just like their male counterparts, have to be ready for action at any time. Smoke from the front line, marking their battle against Islamic State, which launched an assault on northern Iraq last summer, is visible from the base. Many of the women have cut links with their families back home; the fighters come from all corners of the Kurdish region. (Reuters Photo/Asmaa Waguih)

A displaced Yazidi woman takes a nap in a room at a base for female Kurdistan Workers Party (PKK) fighters in Sinjar, March 10, 2015. Hanging on the wall are pictures of jailed Kurdish militant leader Abdullah Ocalan (C), a Yazidi shrine and of PKK fighters who died in fighting. Women fighters at a PKK base on Mount Sinjar in northwest Iraq, just like their male counterparts, have to be ready for action at any time. Smoke from the front line, marking their battle against Islamic State, which launched an assault on northern Iraq last summer, is visible from the base. Many of the women have cut links with their families back home; the fighters come from all corners of the Kurdish region. (Reuters Photo/Asmaa Waguih)

Female Kurdistan Workers Party (PKK) fighters sit with a Yazidi family, including a member of YBS (R), near their base in Sinjar, March 12, 2015. YBS are a Yazidi militant group, who are fighting against Islamic State. Women fighters at a PKK base on Mount Sinjar in northwest Iraq, just like their male counterparts, have to be ready for action at any time. (Reuters Photo/Asmaa Waguih)

Female Kurdistan Workers Party (PKK) fighters talk as they sit around a heater at a base in Sinjar, March 11, 2015. Women fighters at a PKK base on Mount Sinjar in northwest Iraq, just like their male counterparts, have to be ready for action at any time. (Reuters Photo/Asmaa Waguih)

A female Kurdistan Workers Party (PKK) fighter works on her laptop while watching a Kurdish TV station at a base in the Sinjar mountains, March 11, 2015. Women fighters at a PKK base on Mount Sinjar in northwest Iraq, just like their male counterparts, have to be ready for action at any time. (Reuters Photo/Asmaa Waguih)

A female Kurdistan Workers Party (PKK) fighter stands near a security position in Sinjar, March 13, 2015. Women fighters at a PKK base on Mount Sinjar in northwest Iraq, just like their male counterparts, have to be ready for action at any time. Smoke from the front line, marking their battle against Islamic State, which launched an assault on northern Iraq last summer, is visible from the base. Many of the women have cut links with their families back home; the fighters come from all corners of the Kurdish region. (Reuters Photo/Asmaa Waguih)

Female Kurdistan Workers Party (PKK) fighters discuss tactics to reach a position which had been hit by Islamic State car bombs in Sinjar, March 11, 2015. Women fighters at a PKK base on Mount Sinjar in northwest Iraq, just like their male counterparts, have to be ready for action at any time. Smoke from the front line, marking their battle against Islamic State, which launched an assault on northern Iraq last summer, is visible from the base. Many of the women have cut links with their families back home; the fighters come from all corners of the Kurdish region. (Reuters Photo/Asmaa Waguih)

Kurdistan Workers Party (PKK) fighters adjust a machine gun as they prepare to join others near a position which had been hit by Islamic State car bombs in Sinjar, March 11, 2015. Women fighters at a PKK base on Mount Sinjar in northwest Iraq, just like their male counterparts, have to be ready for action at any time. Smoke from the front line, marking their battle against Islamic State, which launched an assault on northern Iraq last summer, is visible from the base. Many of the women have cut links with their families back home; the fighters come from all corners of the Kurdish region. (Reuters Photo/Asmaa Waguih)

Kurdistan Workers Party (PKK) fighters prepare to attend a military funeral for a Yazidi fighter from the YBS who was killed during fighting with Islamic State militants, in Sinjar, March 12, 2015. YBS are a Yazidi militant group, who are fighting against Islamic State. Women fighters at a PKK base on Mount Sinjar in northwest Iraq, just like their male counterparts, have to be ready for action at any time. (Reuters Photo/Asmaa Waguih)

A female Kurdistan Workers Party (PKK) fighter takes a photo with her mobile phone as others visit from another base, in Sinjar, March 10, 2015. Women fighters at a PKK base on Mount Sinjar in northwest Iraq, just like their male counterparts, have to be ready for action at any time. (Reuters Photo/Asmaa Waguih)

Kurdistan Workers Party (PKK) fighters wave goodbye as they leave after a visit from another base, in Sinjar, March 10, 2015. Women fighters at a PKK base on Mount Sinjar in northwest Iraq, just like their male counterparts, have to be ready for action at any time. (Reuters Photo/Asmaa Waguih)

Female Kurdistan Workers Party (PKK) fighters walk through destroyed houses which were freed from Islamic State fighters in Sinjar, March 11, 2015. Women fighters at a PKK base on Mount Sinjar in northwest Iraq, just like their male counterparts, have to be ready for action at any time. (Reuters Photo/Asmaa Waguih)

Female Kurdistan Workers Party (PKK) fighters walk through destroyed houses, which were freed by them from Islamic State fighters, in Sinjar, March 11, 2015. Women fighters at a PKK base on Mount Sinjar in northwest Iraq, just like their male counterparts, have to be ready for action at any time. (Reuters Photo/Asmaa Waguih)

Female Kurdistan Workers Party (PKK) fighters leave to join others at a position which had been hit by Islamic State car bombs in Sinjar, March 11, 2015. Women fighters at a Kurdistan Workers Party (PKK) base on Mount Sinjar in northwest Iraq, just like their male counterparts, have to be ready for action at any time. (Reuters Photo/Asmaa Waguih)

A displaced Yazidi family, including a fighter, who live in tents nearby, chant slogans as a military convoy carrying the body of a Yazidi fighter passes by in Sinjar, March 12, 2015. The convoy was carrying the body of a YBS fighter who was killed during fighting with Islamic State militants. YBS are a Yazidi militant group, who are fighting against Islamic State. Women fighters at a Kurdistan Workers Party (PKK) base on Mount Sinjar in northwest Iraq, just like their male counterparts, have to be ready for action at any time. (Reuters Photo/Asmaa Waguih)

A female Kurdistan Workers Party (PKK) fighter stands outside a base in Sinjar, March 11, 2015. Women fighters at a PKK base on Mount Sinjar in northwest Iraq, just like their male counterparts, have to be ready for action at any time. (Reuters Photo/Asmaa Waguih)

Female Kurdistan Workers Party (PKK) fighters pose for a group picture, with a displaced Yazidi woman (R) who lives near the base in Sinjar, March 13, 2015. Women fighters at a Kurdistan Workers Party (PKK) base on Mount Sinjar in northwest Iraq, just like their male counterparts, have to be ready for action at any time. Smoke from the front line, marking their battle against Islamic State, which launched an assault on northern Iraq last summer, is visible from the base. Many of the women have cut links with their families back home; the fighters come from all corners of the Kurdish region. (Reuters Photo/Asmaa Waguih)

A female Kurdistan Workers Party (PKK) fighter carries bread, as other members play with Yazidi children, at a base in Sinjar, March 13, 2015. Women fighters at a PKK base on Mount Sinjar in northwest Iraq, just like their male counterparts, have to be ready for action at any time. (Reuters Photo/Asmaa Waguih)

The mother of a Yazidi fighter from YBS (2nd R), who was killed during fighting with Islamic State militants, mourns with relatives over the body of her son during a funeral ceremony at a cemetery in Sinjar, March 12, 2015. YBS are a Yazidi militant group, who are fighting against Islamic State. Women fighters at a PKK base on Mount Sinjar in northwest Iraq, just like their male counterparts, have to be ready for action at any time. (Reuters Photo/Asmaa Waguih)

Female Kurdistan Workers Party (PKK) fighters help in an area they use for cooking at a base in Sinjar, March 13, 2015. Women fighters at a PKK base on Mount Sinjar in northwest Iraq, just like their male counterparts, have to be ready for action at any time. (Reuters Photo/Asmaa Waguih)

A female Kurdistan Workers Party (PKK) fighter waits for a drone to land, in Sinjar, March 11, 2015. The drone had flown to check enemy positions near a site which had been hit by two Islamic State car bombs. Women fighters at a PKK base on Mount Sinjar in northwest Iraq, just like their male counterparts, have to be ready for action at any time. (Reuters Photo/Asmaa Waguih)

A female Kurdistan Workers Party (PKK) fighter holds a turkey which had escaped at a base in the Sinjar mountains, March 12, 2015. Women fighters at a Kurdistan Workers Party (PKK) base on Mount Sinjar in northwest Iraq, just like their male counterparts, have to be ready for action at any time. (Reuters Photo/Asmaa Waguih)

Kurdistan Workers Party (PKK) fighters prepare to join others near a position which has been hit by Islamic State car bombs in Sinjar, March 11, 2015. Women fighters at a PKK base on Mount Sinjar in northwest Iraq, just like their male counterparts, have to be ready for action at any time. (Reuters Photo/Asmaa Waguih)

A female Kurdistan Workers Party (PKK) fighter writes notes as she sits in a security position near a base in Sinjar, March 13, 2015. Women fighters at a PKK base on Mount Sinjar in northwest Iraq, just like their male counterparts, have to be ready for action at any time. (Reuters Photo/Asmaa Waguih)

Kurdistan Workers Party (PKK) fighters leave their base in Sinjar, March 10, 2015. Women fighters at a PKK base on Mount Sinjar in northwest Iraq, just like their male counterparts, have to be ready for action at any time. (Reuters Photo/Asmaa Waguih)

A Kurdistan Workers Party (PKK) fighters hugs her comrades as she leaves to go to another base in Sinjar, March 13, 2015. Women fighters at a PKK base on Mount Sinjar in northwest Iraq, just like their male counterparts, have to be ready for action at any time. (Reuters Photo/Asmaa Waguih)

A Kurdistan Workers Party (PKK) fighter looks towards a position which has been hit by Islamic State car bombs in Sinjar, March 11, 2015. Women fighters at a Kurdistan Workers Party (PKK) base on Mount Sinjar in northwest Iraq, just like their male counterparts, have to be ready for action at any time. (Reuters Photo/Asmaa Waguih)

A female Kurdistan Workers Party (PKK) fighter adjusts her scarf while another carries a picture of jailed Kurdish militant leader Abdullah Ocalan at their base in Sinjar March 11, 2015. Women fighters at a PKK base on Mount Sinjar in northwest Iraq, just like their male counterparts, have to be ready for action at any time. Smoke from the front line, marking their battle against Islamic State, which launched an assault on northern Iraq last summer, is visible from the base. Many of the women have cut links with their families back home; the fighters come from all corners of the Kurdish region. (Reuters Photo/Asmaa Waguih)

A female Kurdistan Workers Party (PKK) fighter sleeps at a base in Sinjar, March 11, 2015. Women fighters at a PKK base on Mount Sinjar in northwest Iraq, just like their male counterparts, have to be ready for action at any time. Smoke from the front line, marking their battle against Islamic State, which launched an assault on northern Iraq last summer, is visible from the base. Many of the women have cut links with their families back home; the fighters come from all corners of the Kurdish region. (Reuters Photo/Asmaa Waguih)