President Erdogan is giving signals of an imminent cross-border large-scale military incursion into Syria. Military equipment is on the frontier, and artillery shells now pound positions held by Syrian Kurdish armed forces. Senior officials and analysts believe operations against the groups will commence soon, hoping to conclude before the NATO summit on 29 June. ‘We will crack down on them suddenly overnight’, Erdogan told reporters. The US-backed Syrian Democratic Forces (SDF) said it will coordinate with Syrian troops to fend off any Turkish invasion. An SDF commander said Damascus should use air defence systems against Turkish planes. Turkey’s vowed new offensive will be on areas controlled by the Kurdish YPG militia, a key part of the SDF. Syria warned Turkey there will be no compromise on territorial integrity. Turkey considers the YPG a terrorist organisation. Syrian Kurdish forces are backed by Washington, and co-ordinated with Syria and its ally Russia. See