"Iraq's losses mounted when ISIL took over Mosul. ISIL fighters captured Ajil and Himrin oilfields in Salaheddin province and Qayyarah and three others in Nineveh province. The production potential of these fields, 72,000 bpd under ideal conditions, was rather minuscule from Baghdad's perspective - the country at that time was exporting nearly 2.6 million bpd. But the real damage was in enabling ISIL to finance its war machine. It was able to generate an estimated $45 million a month selling the oil from these fields, and others in Syria, through a labyrinth of oil refining and smuggling operations. The windfall allowed it, for a while, to pay its fighters generously by local standards and keep its murderous campaign going for three long years."