A/HRC/21/50 7 17. The efforts of the international community channelled through the joint special envoy resulted in the presentation of a six-point plan on 10 March 2012. The plan outlined steps to bring about a cessation of violence by all parties and a commitment to a political process. The ceasefire came into effect on 12 April, followed by the deployment by the Security Council of the United Nations Supervision Mission in the Syrian Arab Republic (UNSMIS) on 21 April for an initial period of 90 days to monitor the plan‘s implementation. The arrival of UNSMIS observers had an initial positive impact on the ground, and levels of violence decreased in April. Thereafter, however, military operations intensified to such a level that, by 15 J...