"The SAS is the archetype for most of the world's special forces. The unit is the brainchild of Lieutenant David Stirling, who in 1940 imagined a regiment of highly trained operatives for stealth attacks against enemy Axis powers. But when he tried to get his written plan seen at the Middle East Command Headquarters, he was refused entry. Undeterred, Stirling slipped over the barbed-wire perimeter fence, evaded the sentries, and barged into the office of Major General Neil Ritchie, the chief of staff. Stirling was given carte blanche."
[A similar story is told of the elite Israeli anti-terrorist unit Sayeret Matkal.]