Germany as after WWII the "Iron curtain" was dropped by western Europe in an attempt to staunch communism.
Well think about it, Barnabas already parted from Paul. Paul didn't want to go with Mark. So that takes Paul completely off the list. So it was Barnabas and Mark who went.
This is the answer for you're topic and also I got this from my old computer history so yeah.
A policy or attitude of letting things take their own course