In a quick look, it appears to have been Iraqi military base up to Aug 2014, when it was captured by ISIL, who held it for short time, before it was taken by Kurdish Peshmerga.
bbc.com/news/world-mid…
rudaw.net/english/kurdis…
iraqinews.com/iraq-war/pmf-a… the PMF (Kata'ib Hizbollah) arrested two ISIS leaders near Kirkuk