The Parachute Ranger School (Swedish: Fallskärmsjägarskolan, FJS), is the Swedish Army's paratrooper ranger school and the home of Fallskärmsjägarna (Parachute Rangers) and Särskilda operationsgruppen (Special Operations Group). The school was founded in 1952 by captain Nils-Ivar Carlborg with the intention of creating and training small specialized units no bigger than platoons which were capable of operating deep behind enemy lines and inside enemy-controlled territory.
https://en.wikipedia.org/wiki/Swedish_Parachute_Ranger_School