On 17 October, The Dutch Parliament supported the cancellation of NATO Article 5 for Turkey as a consequence of the Turkish invasion in Syria.
What Are NATO's Articles 4 And 5? The intention behind the Parliament decision is to deny Turkey any right to call the mutual defense clause of NATO (Article 5) as long as Turkey is still in North-East Syria.   The alliance responded quickly and a spokesperson said the alliance was "monitoring the situation very closely and will continue to do so" and "takes it very seriously protecting its members." In April 2012, Turkish Prime Minister Tayyip Erdoğan considered invoking Article 5 of the NATO treaty to protect Turkish national security in a dispute over the Syrian Civil War. “We do not question the viability of Article 5; on the contrary, we expect it to be fulfilled,” Gülnur Aybet, a senior […] According to him, NATO is not considering the possibility of providing Turkey with military assistance in the event of a military operation in the region. Though Article 5 has only been officially invoked once, NATO has taken collective defensive measures in other situations, including deploying missiles on the border of Turkey and Syria in 2012. “NATO countries will not support the invocation of Article 5 over the death of Turkish troops in Idlib in early February,” the source pointed out. With Turkey, Russia, Iran, Iraq, and Gulf states pursuing their own, often conflicting aims in Syria, all against the backdrop of a U.S.-led air and commando campaign against the Islamic State (IS), there is renewed concern at NATO’s headquarters in Brussels that Turkey could see the next flare-up as grounds for citing Article 5: in effect, demanding that its NATO allies deploy forces and come to its collective … For most close observers, it has long seemed only a matter of time before the proxy war between Turkey and Russia in the Middle East would break out into full-scale direct hostilities. Turkey could invoke the collective defense provision of the NATO treaty against Syrian Kurdish militias, a presidential adviser said amid a dispute over the American partnership with those fighters, the Washington Examiner reported. June 26, 2012 by Robert Coalson.