The Balkan Peninsula has many physical features, but there are three main ones, they are the fact that it is a peninsula, its mountains, and its rivers. Within the Balkan Peninsula there are a good majority of ethnicities. There will be a majority of instances that the geography has helped or hindered certain peoples in the Balkans history. The mountains had a few of different effects on the early people living in the Balkan Peninsula. The mountains of this area, helped certain ethnic groups, and hurt others. The mountain made certain divi ....