Ankara and Damascus could clash in Idlib

Syria’s north-west is hotchpotch of manoeuvring government fighters, rebels, external powers and salafi-jihadist groups

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How Afrin campaign unfolds may affect Turkish security

Risk of jihadist terrorism has diminished but renewed PKK attacks could spark nationalist backlash

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Russia's foreign minister has said a deal is nearly there but Iran still fears losing out when the sea is divided up

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Deadly clashes with pro-Damascus forces highlight Washington’s complex operating environment

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Concerns about the security environment have put defence on the political agenda in the run-up to this year's election

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Rivals, budget cuts and Brexit wear down one of the great offices of state

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The Trump administration wants to invest in new nuclear arms, but domestic politics may constrain this

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An alleged coup attempt is prompting a further curtailing of civil liberties and opposition activities

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NATO is turning greater attention towards the European theatre

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Backers of southern independence have taken most of Aden from forces loyal to the internationally-recognised president

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