Before fighters with the group now known as the Islamic State group came to prominence, there was another armed opposition to the Iraqi government in the north.
Those original fighters belong to Sunni tribes that want nothing to do with the Islamic State or its tactics.
Their spokesperson says they are planning to march on Baghdad within three weeks to bring down the goverment.
Al Jazeera's Jamal El-shayyal reports from Erbil.
Source: Al Jazeera