Neutrality during armed conflicts helps, too.
I remember in the late 1980’s...we’re driving towards Interlaaken...all of a sudden, traffic ( two lane road) comes to a dead stop..we see police cars and flashing lights up ahead..I get out to look..we’re next to this big meadow..we can see sheep herded up against the road..all of a sudden, the entireside of this huge cliff opens up..and two fighters roll out and take off...I think they were Hawker Hunters..unreal..