What did Sweden do in World War 2?

While Sweden remained neutral throughout World War II, they did allow emergency landings by both Allied and Axis aircraft, mostly bombers that were too damaged and too distant from their home base to make it back safely. Especially for English and American airmen, sometimes the choice was ditch in the English Channel which was far too cold and they would risk drowning, or head for Sweden. However, because of Sweden's neutrality, many of the airmen were interned in camps (they weren't prisoners of war, instead, they were treated as guests who were not permitted to leave) until exchanges could be arranged (i.e., one American airman and one German airman).

Approximately 1200 American airmen would ultimately be interned in Sweden. But as the number of American airmen "overtook" any reasonable number of possible "exchanges," modified American bombers would make night time "courier" trips to Ireland and Scotland.

For a far more complete history of Swedish involvement in World War II and the American airmen interned there, I would suggest "'Making for Sweden . . . ' Part 2 - The USAAF 1943 to 1945" by Bo Widfeldt and Rolph Wegmann. ISBN: 1-871187-37-0