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Expanding until natural borders are reached, and maintaining those borders once conquered, have been a major policy goal for a number of states. For example, the Roman Republic, and later, the Roman Empire expanded continuously until it reached certain natural borders: first the Alps, later the Rhine river, the Danube river and the Sahara desert
Natural barriers have been important factors in human history, by obstructing migration and invasion. For example, Jared Diamond argues that West European nations have been the dominant powers of the last 500 years because Europe's many natural barriers divided it into competing nation-states and this competition forced the European nations to ...
A landscape border is a mixture of political and natural borders. One example is the defensive forest created by China's Song dynasty in the eleventh century. [6] Such a border is political in the sense that it is human-demarcated, usually through a treaty. However, a landscape border is not demarcated by fences and walls but instead landscape ...
Movement is the travel of people, goods, and ideas from one location to another. Examples of movement include the United States' westward expansion, the Information Revolution, and immigration. New devices such as the airplane and the Internet allow physical and ideological goods to be transferred long distances in short time intervals. A ...
The coincidence of another landscape feature with a parish boundary can be used to date that feature—for example in the Time Team episode screened on 11 March 2007, a mill leat was determined to pre-date the Norman conquest because it coincided with a parish boundary.
Map of the Roman Empire during the reign of emperor Hadrian, 125 AD. The borders of the Roman Empire, which fluctuated throughout the empire's history, were realised as a combination of military roads and linked forts, natural frontiers (most notably the Rhine and Danube rivers) and man-made fortifications which separated the lands of the empire from the countries beyond.
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A border barrier does not usually indicate the location of the actual border, and is usually constructed unilaterally by a country, without the agreement or cooperation of the other country. Examples of border walls include the ancient Great Wall of China, a series of walls separating China from nomadic empires to the north. The construction of ...