4Chan is known for many things, but the imageboard website is most famous for producing some of the best photoshopped images around.

And now it has decided to destroy the social media image of brutal terrorist group Islamic State (Isis) by turning them into funny-looking ducks.

The war against Isis on 4Chan now has gone viral, with dozens of images taken from Isis propaganda videos and photos being turned into "ducks". 

It all began a few days ago, when a memeber posted a message on the board of Shit4chanSays (/s4s/): "how about castrating the image of [Isis] by replacing the faces on ALL the propaganda photos with bath ducks. (sic)" 

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The call was soon answered. The group of 4chan pranksters codenamed their operation against Isis "ALLAHU QUACKBAR", a nomenclature meant solely for annoying and showing dispect to jihadist groups. 

As part of the operation, 4chan users photoshop images of Isis terrorists by replacing their faces with yellow rubber ducks and their guns with toilet-bowl brushes.

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Some of the submissions from 4Chan have been turned into an album on Imgur called  "create the duck state".