Border - Politics

Politics

Political borders have a variety of meanings for those whom they affect. Many borders in the world have checkpoints where border control agents inspect those crossing the boundary.

In much of Europe, such controls were abolished by the Schengen Agreement and subsequent European Union legislation. Since the Treaty of Amsterdam, the competence to pass laws on crossing internal and external borders within the European Union and the associated Schengen States (Iceland, Norway, Switzerland, and Liechtenstein) lies exclusively within the jurisdiction of the European Union, except where states have used a specific right to opt-out (United Kingdom and Ireland, which maintain a common travel area amongst themselves). For details, see Schengen Area.

The United States has notably increased measures taken in border control on the Canada–United States border and the United States–Mexico border during its War on Terrorism (See Shantz 2010). One American writer has said that the 3,600 km (2,200 mi) US-Mexico border is probably "the world's longest boundary between a First World and Third World country."

Historic borders such as the Great Wall of China, the Maginot Line, and Hadrian's Wall have played a great many roles and been marked in different ways. While the stone walls, the Great Wall of China and the Roman Hadrian's Wall in Britain had military functions, the entirety of the Roman borders were very porous, which encouraged Roman economic activity with neighbors. On the other hand, a border like the Maginot Line was entirely military and was meant to prevent any access in what was to be World War II to France by its neighbor, Germany. Germany ended up going around the Maginot Line through Belgium just as it had done in World War I.