The battle of Raqqa (2017), also known as the second battle of Raqqa, was the fifth and final phase of the Raqqa campaign (2016–2017) launched by the Syrian Democratic Forces (SDF) against the Islamic State (IS) with an aim to seize the city of Raqqa, the de facto capital of ISIL since 2014. The battle began on 6 June 2017, and was supported by airstrikes and ground troops from the US-led coalition. The operation was named the "Great Battle" by the SDF. It concluded on 17 October 2017, with the SDF fully capturing the city of Raqqa.
The battle ran concurrently with the conclusion of the Battle of Mosul (2016–2017), which had started seven months earlier, as part of an effort by the CJTF–OIR and its allies to strip ISIL of its regional centers of power and to dismantle it as a state. It continued while Syrian Arab Army and allies began clearing ISIL across the Euphrates, reaching the point of the lifting of the Siege of Deir ez-Zor (2014–2017).