The last war in the Balkans finished around 2000. Until today, land mines are a big problem, especially in Bosnia. There are huge regions where you shouldn't leave paved terrain.
Since I love hiking, this posed a serious threats during my stay in Bosnia. At the same time, I asked myself whether this is no problem in the Alps. Granted, the war in Central Europe ended ~50 years earlier than the Balkan war, so maybe, the mines in the alps are already removed. So I asked my parents and grandparents, whether mines were a problem in Central Europe shortly after the second world war. All of them couldn't remember that it was a particular problem.
So why is this the case? Weren't mines just not used that often during the second world war? Or are there other reasons?