General Assembly

It now seems fairly clear that the US and the UK are set to take military action in Syria in the coming days in response to the recent chemical attacks there. The UK Prime Minister, UK Foreign Secretary and the UK Secretary of State for Defence have all asserted that any action taken in Syria will be lawful. But on what grounds will military action in Syria be lawful. As is well known, United Nations Charter prohibits the use of force in Art. 2(4), as does customary international law. The UN Charter provides 2 clear exceptions to the prohibition of the use of force: self defence and authorization by the UN Security Council. It is almost certain that there will be no Security Council authorization. In a previous post, I considered the possibility of a (collective) self defence justification for the use of force in response to a use of chemical weapons. The scenario contemplated then is very different from the situation that has emerged, and the language used, at least…