On August 1, 2019, after several months of intense fighting between the government and rebel forces, the Syrian government announced a unilateral ceasefire conditional on the rebels complying with the initial demilitarization conditions of 2018.   According to reports, most of the rebel groups accepted the offer.   Shortly after the ceasefire came into effect, Hayat Tahrir al-Sham stated that they would categorically refuse to leave an area under their control, which was an essential requirement of both the original agreement and the conditional ceasefire.   The next day, the government announced the end of the ceasefire and the resumption of military operations, citing the refusal of rebel groups to withdraw from the area as a reason for the ceasefire`s failure.   A considerable part of the DMZ`s territory was then conquered by the Syrian army and its allies in the final phase of the offensive. Another ceasefire was announced in late August, confirming the government`s benefits. Some rebel groups, meanwhile, have expressed their refusal to comply with the agreement and withdraw from the remaining “demilitarized” zones, signaling that the agreement would not be revived.  Russia on Friday requested a closed-door meeting of the UN Security Council to brief members of the deal, a diplomatic source told AFP. For its part, the Russian side has been reluctant to agree to participate in the meeting scheduled for Istanbul, as Erdogan admitted on February 24. He said: “It can be said with certainty that the quadrennial summit is not `definitive`, because when Mr Putin proposed that it would be `more appropriate to do it bilaterally`, I said, `It could be.` As for the date, we almost agree, on March 5, the site will probably be Istanbul. But the next day, Peskov said, “We are not talking about bilateral contacts now, but the possibility of a multilateral meeting is being considered.” Peskov was referring to the regular trilateral meeting in Astana scheduled for March 6 in Tehran, which would be more favorable from Moscow`s point of view, as it would force Erdogan to discuss Idlib in a format where both countries support Assad. Peskov confirmed this on February 27 by categorically ruling out the proposed meeting between Merkel and Macron, saying Putin had “other work plans for March 5.” Following the failure of the tripartite summit in Tehran, Russia and Turkey reached a bilateral agreement in Sochi and agreed to maintain the remaining de-escalation zone. . .