There is a group of some 7,500 soldiers who have been fighting a dangerous war for two years. They fight despite daily threats of injury and death.
They fight with weapons that are bigger and heavier than they are against a relentless enemy.
And yet they continue to fight, according to an investigation published by Marie Claire magazine.
They are the YPJ or the Women's Protection Unit, an all-women, all-volunteer Kurdish military faction in Syria that was formed in 2012 to defend the Kurdish population against the deadly attacks led by Syrian President Bashar al-Assad, the al-Nusra Front and ISIS.
So who are these women who confront some of the world's most notorious and lethal groups? Take a look and get to know them. Some of them are as young as 12 years old!