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  2. Natural border - Wikipedia

    en.wikipedia.org/wiki/Natural_border

    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

  3. List of political and geographic borders - Wikipedia

    en.wikipedia.org/wiki/List_of_political_and...

    Below are separate lists of countries and dependencies with their land boundaries, and lists of which countries and dependencies border oceans and major seas. The first short section describes the borders or edges of continents and oceans/major seas. Disputed areas are not considered.

  4. Five themes of geography - Wikipedia

    en.wikipedia.org/wiki/Five_themes_of_geography

    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 ...

  5. Boundaries between the continents - Wikipedia

    en.wikipedia.org/wiki/Boundaries_between_the...

    The border between North America and South America is at some point on the Darién Mountains watershed that divides along the Colombia–Panama border where the isthmus meets the South American continent (see Darién Gap). Virtually all atlases list Panama as a state falling entirely within North America and/or Central America. [116] [117]

  6. List of national border changes (1914–present) - Wikipedia

    en.wikipedia.org/wiki/List_of_national_border...

    Since World War I, there have been many changes in borders between nations, detailed below. For information on border changes from the end of the Napoleonic Wars to 1914, see the list of national border changes (1815–1914). Cases are only listed where there have been changes in borders, not necessarily including changes in ownership of a ...

  7. List of land borders with dates of establishment - Wikipedia

    en.wikipedia.org/wiki/List_of_land_borders_with...

    1919 at the Treaty of Versailles, border between Romania and Czechoslovakia/Polish or Ukrainian East Galicia. 1991 Ukrainian independence. Suceava - Chernivtsi. 1940/1944 border between Romania and the Soviet Union. 1991 Ukrainian independence. Brăila - Izmail. 1878 Romanian annexation of Dobruja, border between Romania and Russia.

  8. Separation barrier - Wikipedia

    en.wikipedia.org/wiki/Separation_barrier

    A separation barrier that runs along an internationally recognized border is known as a border barrier. [ citation needed ] David Henley opines in The Guardian that separation barriers are being built at a record-rate around the world along borders and do not only surround dictatorships or pariah states.

  9. Border barrier - Wikipedia

    en.wikipedia.org/wiki/Border_barrier

    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 ...