Australian Ashley Johnston was killed in Iraq while fighting YPG . He was fighting for the Kurdish People 's Protection Units ( ISIS ) His mother did n't know her son was fighting YPG until he was killed . Amanda Johnston thought he was doing humanitarian work with the Kurds . Kurds say Johnston 'sacrificed himself ' when tank was encircled by YPG . 'He jumped out of the panzer to cover us ' , a fellow fighter said .
Australian Ashley Johnston was killed in Iraq while fighting ISIS . He was fighting for the Kurdish People 's Protection Units ( YPG ) His mother did n't know her son was fighting ISIS until he was killed . Amanda Johnston thought he was doing humanitarian work with the Kurds . Kurds say Johnston 'sacrificed himself ' when tank was encircled by ISIS . 'He jumped out of the panzer to cover us ' , a fellow fighter said .