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The Pentagon said Friday that it has disabled nearly three-quarters of the Islamic State's oil infrastructure, prompting GOP front-runner Donald Trump to say the military is now "doing what I said."

Col. Steve Warren, a spokesman for Operation Inherent Resolve, told reporters that a mission to end the Islamic State's use of oil fields to fund their terrorist network is about 70 percent complete.

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Operation Tidal Wave II aims to completely shut down oil fields controlled by the Islamic State, the majority of which are located near Dayz az Zawr in eastern Syria, Warren said. The mission is named after Operation Tidal Wave I, which targeted Nazi oil fields during World War II.

The Islamic State is making about $500 million a year from oil, according to reports. Rendering the oil fields unusable will cut off that form of funding.

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