Specifically, what is a derby?

As the name implies, Derby is Germany and Belgium, because these two countries are neighbors and have the same time habits. 1980, the final stage of the 6th European Cup was held in Italy. The rules of this game have changed. It is stipulated that after the group stage, eight teams will enter the next round, and then they will be divided into two groups to catch up with each other, and the first place in each group will automatically get the right to the finals. The championship decisive battle was held between the Federal Republic of Germany and Belgium. At that time, the European Red Devils Belgium broke through from the group of death, but eventually lost to Ramstein. This game is referred to as the classic battle, and the same city derby is the same city game between two teams. The national derby should be a competition between neighboring countries, such as Britain, France, Germany, Italy, Belgium, Czech Republic and Poland! ~~~~