The United Nations Security Council Resolution 2254 was unanimously adopted on 18 December 2015.

It called for a ceasefire and political settlement in Syria as a means to end the civil war.

[3] The resolution "demanded" that all parties immediately cease any attacks against civilian targets, it "urged" all Member States to support efforts to achieve a ceasefire and "requested" the U.N. to convene the parties to engage in formal negotiations in early January 2016.

Groups seen as terrorist by the U.N. Security Council, including the Islamic State of Iraq and the Levant and the al-Nusra Front, were excluded.

[2] The UN Resolution 2254 was invoked by Iran, Russia and Turkey as the legal basis for the political process required to solve the Syrian conflict, at the first round of the Astana Talks in January 2017.