The six soldiers flew from Derna airfield on 27 May 1943 .
The six soldiers parachuted to Black Lake in Montenegro at the height of a large German offensive Operation Schwarz which aimed to destroy the partisan forces .
The six soldiers flew from Derna airfield on 27 May 1943 and parachuted to Black Lake in Montenegro at the height of a large German offensive Operation Schwarz which aimed to destroy the partisan forces .