A mosque that was torched is seen in Sinjar town, Iraq May 1, 2016. They share little more than an enemy and struggle to communicate on the battlefield, but together two relatively obscure groups have opened up a new front against Islamic State militants in a remote corner of Iraq. The unlikely alliance between the Sinjar Resistance Units, an offshoot of a leftist Kurdish organisation, and Abdulkhaleq al-Jarba, a Arab tribal militia is a measure of the extent to which Islamic State has upended the regional order. Across Iraq and Syria, new groups have emerged where old powers have waned, competing to claim fragments of territory from Islamic State and complicating the outlook when they win. REUTERS/Goran Tomasevic SEARCH "YBS TOMASEVIC" FOR THIS STORY. SEARCH "THE WIDER IMAGE" FOR ALL STORIES