The legitimacy of actions of coalition against Daesh (the Islamic state) in Syria

The initiation of U.S led coalition air strikes against Daesh positions in Iraq and Syria, has invoked the question of its legitimacy under the International In an attempt to justify its military operations, the aforementioned coalition resorts to principles such as the principle of self-defense and the unwilling or unable doctrine under International Law. However, it was the Security Council's Resolution 2249 (2015) that shed light on the matter in the end. Emphasizing on sovereignty, territorial integrity and independence of the States of Iraq and Syria, The said Resolution determines IS as "A global and unprecedented threat to international peace and security". The said instrument calls upon all states to take all necessary measures against IS, and even though it does not explicitly authorize or provide any legal basis for use of force either in Syria or Iraq, the wording of the mentioned resolution indicates support from The Council. Based on the principle of self-defense and the resolutions adopted by UN's Security Council, this paper will discuss the key arguments regarding the use of force against The Islamic State by The Coalition.