If you’re having difficulty in understanding what’s happening with the militants of Islamic State in Iraq and Syria at the moment without going any further back than Bush War II (the overthrow of Saddam Hussein – and the roots of the conflicts and tensions in the region do go back to at least the end of World War 1 and the Treaty of Versailles! Ed.) then Aubrey Bailey of Fleet in Hampshire has provided a concise and not too confusing potted guide.
Hat tip: Marina S.