The leaflet drop is part of the U.S. military’s psychological operations to show potential ISIS recruits that they are part of a losing effort.
Some 60,000 of the leaflets were dropped over Ar Raqqa, Syria early on the morning of March 16, officials said.
The leaflets were dropped by a single U.S. Air Force F-15E fighter aircraft carrying a PDU-5B leaflet canister, according to the Pentagon.
Col. Steve Warren, a Pentagon spokesman, told reporters today that the drop was intended to dissuade potential ISIS recruits from joining the group.
"The message of this leaflet is if you allow yourself to be recruited by Daesh you will find yourself in a meat grinder,” said Warren, using the Islamic acronym for the group.
The leaflet shows a room identified by a sign with the arrow as a "Daesh Recruiting Office," and the meat grinder is labelled "Daesh."