The Pentagon said the U.S. has spent more than $2.7 billion on the war against Daesh militants in Iraq and Syria since bombings began last August, and the average daily cost is now more than $9 million, Fox news reported.

The Defense Department is releasing a detailed breakdown of the costs, showing that the Air Force has borne two-thirds of the daily spending.

The daily combat, reconnaissance and other aircraft flights eat up more than $5 million a day. And the data provide a rare look into special operations costs, which totaled more than $200 million since August.

Congress has debated and rejected legislation that would have banned spending on the combat operations until lawmakers passed a new war powers resolution.