Border - Wikipedia
https://en.wikipedia.org/wiki/BorderPolitical borders are imposed on the world through human agency. That means that although a political border may follow a river or mountain range, such a feature does not automatically define the political border, even though it may be a major physical barrier to crossing. Political borders are often classified by whether or not they follow conspicuou…
Border control - Wikipedia
https://en.wikipedia.org/wiki/Border_controlBorder control refers to measures taken by governments to monitor and regulate the movement of people, animals, and goods across land, air, and maritime borders.While border control is typically associated with international borders, it also encompasses controls imposed on internal borders within a single state.. Border control measures serve a variety of purposes, ranging …