Border barrier

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**Current Border Barriers**:
– Argentina–Paraguay barrier (2014, 1.3 km)
– Austrian border barrier (2015, 3.7 km)
– Granada-Castile border walls (1238-1833)
– Asilah border walls (15th century)
– Ming Dynasty wall in Macau (1570)

**Historical Border Barriers**:
– Great Hedge of India (1803)
– Chile-Mapuche border forts (1598-1883)
– Zanja de Alsina (1870s)
– French Conchinchina-Nguyễn dynasty barriers (1862-1887)
– Border barriers in the Captaincy General of Chile

**Defunct Border Barriers in Modern Times**:
– Kiautschou Bay-Qing dynasty barriers (1898-1922)
– Czechoslovak border fortifications (1935-1938)
– Maginot Line (1929-1938)
– Finnish-Soviet Union border barriers
– Portuguese India-Mughal Empire barriers (1505-1961)

**Global Border Barrier Overview**:
– Serve for border control, defense, and territorial claims
– Examples: Great Wall of China, post-2000 construction increase
– Usually unilateral constructions
– Do not necessarily indicate border location
– Recent developments in Bulgaria, France, China, Chile, Denmark, Poland, Saudi Arabia, Slovenia, Serbia, Turkey

**Public Opinion and Government Actions**:
– Majority believe current security is inadequate
– Support for physical barriers varies
– Trump’s initiatives on the Mexican border wall
– Government actions related to border security funding
– Historical context, media coverage, and evolution of border barriers

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