Britain's government on Wednesday voted in favour of joining other counties in bombing ISIS in Syria. The first attacks were carried out just hours later.
Prime Minister David Cameron is determined to target ISIS in its heartland of Syria. The city of Raqqa in the north of the country is the terrorist group's self-declared capital.
The decision to launch bombings has caused major splits in the Labour Party.
Below are some of the first pictures from RAF Akrotiri in Cyprus, a key base from which many of the attacks will be launched.
Four RAF Tornado Jets took off Wednesday night from the Akrotiri Royal Air Force Base on the island nation of Cyprus, according to Britain's Ministry of Defence.
The overnight operation occurred just three hours after British Parliament voted 397 to 223 in favour of bombing ISIS in Syria.
Pilots and ground crew began making preparations on Wednesday as Parliament deliberated for nearly 10 hours over whether to approve Syria strikes.
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