Deir ez-Zor campaign (2017–2019)

Target entity: Deir ez-Zor campaign (2017–2019)
Context triple: [Eastern Syria campaign (2017–2019), notableBattle, Deir ez-Zor campaign (2017–2019)]

• A. Eastern Syria campaign (2017–2019)
  The Eastern Syria campaign (2017–2019) was a major phase of the Syrian Civil War in which the Syrian Democratic Forces, backed by the U.S.-led coalition, fought to capture remaining Islamic State strongholds along the Euphrates River in eastern Syria.
• B. Siege of Deir ez-Zor (2014–2017)
  The Siege of Deir ez-Zor (2014–2017) was a prolonged and strategically crucial battle of the Syrian Civil War in which Islamic State forces encircled and repeatedly attacked Syrian government–held districts of the city until the siege was broken by the Syrian Army and its allies.
• C. Operation Euphrates Shield
  Operation Euphrates Shield was a Turkish-led military intervention launched in northern Syria in 2016 to push back ISIS and limit Kurdish militia influence along Turkey’s border.
• D. Idlib offensive
  The Idlib offensive was a major military campaign in northwestern Syria involving government forces, rebel groups, and foreign actors, centered on control of the last significant opposition-held stronghold during the Syrian Civil War.
• E. Samarra offensive
  The Samarra offensive was a World War I campaign on the Mesopotamian front in 1917, in which Ottoman and British forces fought for control of the strategically important city of Samarra in present-day Iraq.
• F. None of above. chosen
• G. Unsure - the case is ambiguous/there is not enough information to decide.

Target entity: Deir ez-Zor campaign (2017–2019)
Target entity description: The Deir ez-Zor campaign (2017–2019) was a major military offensive in eastern Syria during the Syrian Civil War, primarily involving Syrian government forces and their allies against ISIS to break the long-standing siege of Deir ez-Zor and reclaim surrounding territory.

• A. Eastern Syria campaign (2017–2019)
  The Eastern Syria campaign (2017–2019) was a major phase of the Syrian Civil War in which the Syrian Democratic Forces, backed by the U.S.-led coalition, fought to capture remaining Islamic State strongholds along the Euphrates River in eastern Syria.
• B. Siege of Deir ez-Zor (2014–2017)
  The Siege of Deir ez-Zor (2014–2017) was a prolonged and strategically crucial battle of the Syrian Civil War in which Islamic State forces encircled and repeatedly attacked Syrian government–held districts of the city until the siege was broken by the Syrian Army and its allies.
• C. Operation Euphrates Shield
  Operation Euphrates Shield was a Turkish-led military intervention launched in northern Syria in 2016 to push back ISIS and limit Kurdish militia influence along Turkey’s border.
• D. Idlib offensive
  The Idlib offensive was a major military campaign in northwestern Syria involving government forces, rebel groups, and foreign actors, centered on control of the last significant opposition-held stronghold during the Syrian Civil War.
• E. Samarra offensive
  The Samarra offensive was a World War I campaign on the Mesopotamian front in 1917, in which Ottoman and British forces fought for control of the strategically important city of Samarra in present-day Iraq.
• F. None of above. chosen