Warfare History Network
“We were to be terrorists. Our job was to terrorize the Germans,” one former member said dramatically. Another more prosaically likened it to poaching: “Creep in, set the traps, hang about, collect the spoils, and get away without being caught.”
Both descriptions were equally appropriate in describing one of the least known special forces units of World War II. Although British, it owed its origin, ironically, to the Germans. They had designed a collapsible sporting canoe, effective for both shallow water and deep, rougher seas, called a Folbot.
http://nationalinterest.org/blog/the-buzz/britains-elite-navy-seals-you-never-heard-hitler-feared-22798