The US Air Force has released video showing 40 tonnes of bombs being dropped on an island "infested" by Isil.
Bombs were dropped on Qanus Island in the Tigris River, in Iraq, by planes from the US and allied countries.
The video was released on Tuesday and showed a series of explosions after the raid by F-15 and F-35 jets.
On Twitter, the air force said: “Here’s what it looks like when @USAFCENT #F15 and #F35 jets drop 36,000 Kg of bombs on a Daesh infested island."
The island, north of Baghdad, was said to have become a safe haven for Isis fighters hiding in thick vegetation.
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It had become a "major transit hub" for Isis moving from Syria and the Jazeera desert into Mosul, Makhmour, and the Kirkuk region.
In a statement the US-led coalition said: "We’re denying them the ability to hide on Qanus Island. We’re setting the conditions for our partner forces to continue bringing stability to the region."
Brigadier General. William Seely, the US commander of Task Force-Iraq in Baghdad, told ABC News: "As they withdrew back into Syria, they looked at their future, and so they started sending out fighters, sending out logistics, sending out groups of people.
"They’re trying to get logistics set up. They’re trying to conduct operations. They’re trying to refinance their operations."