Six months into the jihadi offensive in Iraq, the autonomous Kurds said Wednesday they had lost more than 700 fighters and argued the burden of hosting a million displaced civilians was becoming unsustainable, AFP reported.

Since ISIS launched a devastating offensive from Syria on June 9, Iraq’s Kurds have been involved in battles along a frontline stretching more than 1,000 kilometers (600 miles).

A statement from the region’s military forces, known as the peshmerga, said 727 members of the Kurdish security forces had been killed and 3,564 wounded since June 10.

The dead and wounded included “officers, non-commissioned officers, members of the Asayish (intelligence agency), of the police and some peshmerga veterans,” it said.

The peshmerga ministry said 34 members of the Kurdish security forces are also still reported as missing.

The last overall toll released by an official Kurdish source was on Aug. 8, when the regional presidency’s chief of staff Fuad Hussein said 150 peshmerga had been killed.