In the war against the Islamic State, the United States has relied heavily on support from the skies. It’s for this reason that more than two-thirds of the $9 million-per-day of military spending on the war has been allocated to the Air Force.
Total spending on the war, according to data released by the Department of Defense in June 2015, has been $2.74 billion. Of this, $1.83 billion has gone to the Air Force, with the rest being divided between the Army ($274 million), Navy ($438 million) and Special Ops ($204 million).