Transcript for ISIS troops being pushed out of Raqqa headquarters

We now head to the frontlines in Syria. The u.s.-led coalition is looking for a knockdown punch against ISIS. Pushing them out of their head janua headquarters in the city of raqqa. Here's Ian Pannell. Reporter: Tonight, driving into the heartland of ISIS. Going forward with american-backed forces. Until recently, the militants controlled this land. Going to the front lines with the Christian fighters who are taking on the militants. The fighters take us to a makeshift mosque set up by ISIS. This is the flag of ISIS here. We find evidence of drug abuse. You can see the needle there. A sign of the pressure the militants now face. America is sending vehicles and guns to local forces. Foreign volunteers have joined the fight against ISIS from America to Europe. The least I can do is fight and resist them and fight back. Reporter: Let me just explain. The sound you can hear. A U.S. Military base is nearby. Mortars going out. I think the morale of the American war machine gives is incredibly strong. Reporter: Sozdar Bawer leads a unit of local volunteers on the front line. The young Syrian kurd joined straight from high school. Reporter: She's says she's fighting to protect and liberate the people. But she's worried her troops don't have the guns or protection they need. This is the enemy. ISIS in raqqa, standing and fighting to the death as shown in their own propaganda film. We've come up to one of the front line positions. The fighters are holding this ground, trying to protect the other fighters trying to move forward. They've been attacked by ISIS snipers. Life ends quickly here. The day after we met sozdar, she was killed. She was just 24 years old. Im -- it seemed everyone we met has lost a loved one or knows someone who has died. Tom? Ian, thank you. And more of the reporting from the ISIS front lines on "Gma" in the morning, and on "World news tonight."

This transcript has been automatically generated and may not be 100% accurate.