What is interesting about the differences involved by the US and UK respectively to justify their military campaign against ISIS is the fact that in the former the Obama administration is relying upon post-9/11 measures and the UK is using Article 51 of the UN Charter to justify its operations,
https://www.the-newshub.com/stories...bing-raids-in-syria-to-protect-iraq-from-isis
https://www.the-newshub.com/stories...bing-raids-in-syria-to-protect-iraq-from-isis