Fact - Nearly ALL the worlds Special Forces base their military model on the British SAS. In fact, the USA's Delta Force was set up after the founder spent time attached to the SAS. The Delta Forces even uses an SAS organisational structure using troops and squadrons. It's often remarked that the sand beret is also worn by US Rangers but this was a recent development and in any case the Rangers are NOT the same kind of unit. It can be said with confidence that the world's most professional special forces is that belonging to Britain.