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{{Ficha de conflicto militar}}
Las '''barreras técnicas al comercio (BTC)''' (en inglés ''Technical barriers to trade'' [''TBT'']) es una categoría de barreras al comercio distintas a las tarifarias, que aúnan una amplia variedad de regulaciones entre mercados, para proteger sus consumidores, proteger sus recursos naturales (entre otros objetivos), pero también pueden ser utilizados (o percibidos por otros países) como una discriminación contra las importaciones para proteger la industria doméstica.
El asedio
The '''siege of Burgos''' was a siege of the [[castle of Burgos]] in the [[Kingdom of Castile]] between 1475 and early 1476. It was part of the [[War of the Castilian Succession]].
 
== The siege ==
Una clasificación realizada en 2012 por la MAST (Multi-Agency Support Team) registró 16 clases de medidas no tarifarias contra el comercio. En la clasificación de las medidas no tarifarias, define las BTC como "las medidas referidas a regulaciones técnicas, y procedimientos para asegurar la conformidad con regulaciones técnicas y estándar, excluyendo medidas cubiertas por el Acuerdo SPS". Aquí las barreras técnicas para el comercio se refieren a medidas tales como requerimientos en etiquetado, especificaciones técnicas o estadarizado en calidad u otras medidas para proteger el medio. Ademés también se incluyen todos las medidas de no conformidad relativas a requerimientos técnicos, tales como certificación, pruebas o inspección.<ref>{{Cita web|url=http://unctad.org/en/PublicationsLibrary/ditctab20122_en.pdf|título=UNCTAD. Publication 2012}}</ref> Otros ejemplos de barreras técnicas se refieren al peso, empaquetado y tamaño, ingredientes o estándares de identificación, restricciones de almacenamiento o pruebas de importación y certificado de procedimientos.
In August and September 1475 Queen [[Isabella I of Castille]] had strengthened garrisons near the city of Burgos while her husband [[Ferdinand II of Aragon]] besieged the city's fortress.<ref name="Liss2015">{{cite book|author=Peggy K. Liss|title=Isabel the Queen: Life and Times|url=https://books.google.com/books?id=_krkCgAAQBAJ&pg=PT110|date=10 November 2015|publisher=University of Pennsylvania Press, Incorporated|isbn=978-0-8122-9320-3|pages=110–111}}</ref> The fortress was armed with large [[Lombard (gun)|Lombard guns]] that bombarded the city, which had pledged to support Isabella.<ref name="Liss2004_2">{{cite book|author=Peggy K. Liss|title=Isabel the Queen: Life and Times|url=https://books.google.com/books?id=VZt0BAAAQBAJ&pg=PA125|date=20 December 2004|publisher=University of Pennsylvania Press|isbn=978-0-8122-1897-8|page=125}}</ref>
 
The queen's forces harassed King [[Afonso V of Portugal]] troops, and managed to cut their supply lines.<ref name="Tremlett2017">{{cite book|author=Giles Tremlett|title=Isabella of Castile: Europe's First Great Queen|url=https://books.google.com/books?id=-_uFDAAAQBAJ&pg=PT134|date=9 February 2017|publisher=Bloomsbury Publishing|isbn=978-1-4088-5396-2|pages=134-135}}</ref> After learning that the road north from [[Peñafiel, Spain|Peñafiel]] was cut, the Portuguese turned back.<ref name="Liss2015" /> Consequently, the Portuguese retreated back to [[Toro, Zamora|Toro]] and moved to [[Zamora, Spain|Zamora]] in October for the winter.<ref name="Liss2015" /> These actions prevented the Portuguese from relieving the besieged castle garrison.<ref name="Tremlett2017" />
El Acuerdo sobre las Barreras Técnicas del Comercio<ref>{{Cita web|url=https://www.wto.org/spanish/tratop_s/tbt_s/tbt_s.htm|título=OMC {{!}} Obstáculos técnicos al comercio|fechaacceso=2021-01-24|sitioweb=www.wto.org}}</ref> de la [[Organización Mundial del Comercio|OMC]] da reglas para tratar de disminuir esas barreras. Sin embargo, expertos en comercios ven que las TBT tienen un gran potencial para ser usadas por países importadores al convertirse en obstáculos (disfrazados o poco claros) para el comercio.
 
By the end of November 1475, King Ferdinand's brother [[Alfonso de Aragón y de Escobar|Alfonso of Aragon]] arrived with skilled [[Siege engineer|siege engineers]]. He had gained fame for capturing the [[Catalonia|Catalan]] castle of [[Amposta]].<ref name="Tremlett2017" /><ref name="Liss2015" />
La [[Organización para la Cooperación y el Desarrollo Económicos|OCDE]] ha estado trabajando para llegar a una estandarización común con la plantilla ISTR<ref>http://www.astm.org/SNEWS/MJ_2011/perspective_mj11.html</ref> permitiendo llegar a una implementación de estandares comunes en el acuerdo de la Organización Mundial de Comercio.
 
King Ferdinand II could not be present when the Burgos garrison surrendered, as he held the [[Battle of Toro#Zamora: prelude to the Battle of Toro|siege of Zamora]] so important that his presence was required there.<ref name="Edwards2014">{{cite book|author=J. Edwards|title=Ferdinand and Isabella|url=https://books.google.com/books?id=pnHJAwAAQBAJ&pg=PA17|date=11 June 2014|publisher=Routledge|isbn=978-1-317-89345-5|page=17}}</ref> He left for Zamora in early December.<ref>{{cite book|title=History of the Reign of Ferdinand and Isabella the Catholic, etc|url=https://books.google.com/books?id=tQxmAAAAcAAJ&pg=PA101|year=1854|publisher=R. Bentley|page=101}}</ref> The city had fallen quickly, but the [[castle of Zamora]] was retained by the Portuguese. As the king had left, Queen Isabella was tasked with receiving the surrender of Burgos.<ref name="Edwards2014" />
=== Unión Europea ===
Existe un Reglamento de Obstáculos del Comercio en la Unión Europea que permite denunciar aquellas medidas que obstaculicen el comercio con mercados exteriores.<ref>{{Cita web|url=https://www.grupoioe.es/barreras-tecnicas-en-el-comercio-exterior/|título=Barreras técnicas en el comercio exterior|fechaacceso=2021-01-24|fecha=2018-08-30|sitioweb=Grupo IOE|idioma=es}}</ref> Esto permite que empresas o asociaciones de productores puedan denunciar alguna barrera que le impida exportar en otros países. Es posible que en el mercado interior comunitario algún país instituya alguna legislación para proteger el mercado interno<ref>{{Cita web|url=https://www.icex.es/icex/es/Navegacion-zona-contacto/revista-el-exportador/observatorio2/REP2014291134.html|título=Barreras técnicas comerciales|autor=Gillermo Ariza para ICEX. Ministerio de Comercio e Industria de España.|enlaceautor=ICEX}}</ref>, es en este caso cuando la Unión Europea ha establecido normas europeas de normalización que evitarían este desajuste.
 
The city's fortress surrendered after nine months. Tunnelers had cut off the water supply, and the [[garrison]] asked for surrender terms ten days later,<ref name="Tremlett2017" /> on 2 December 1475.<ref name="Liss2015" /> After a customary truce of two months, the besieging force was to take control of the fortress.<ref name="Tremlett2017" /><ref name="Liss2015" /> However, commander ([[alcaide]]) of the garrison [[Juan de Stúñiga]]<ref name="Liss2004_2" /> surrendered early on 19 January, and was commended for his valor before his dismissal by Isabella. This act made his father switch sides to Isabella.<ref name="Liss2015" /> [[Cardinal Mendoza]], usually part of Queen Isabella's retinue, had overseen the final negotiations, and by 2 February 1476 the queen could visit the fortress.<ref name="Tremlett2017" />
==Referencias==
 
{{Reflist}}
== Aftermath ==
* UNCTAD's [http://unctad.org/en/PublicationsLibrary/ditctab20122_en.pdf'''Classification of Non-Tariff Measures (2012)'''] report
The fall of Burgos was one of the first major victories against [[Joanna la Beltraneja]]. The city of Burgos was a necessary asset for controlling the [[Kingdom of Castile]].<ref name="Tremlett2017" /> The troops tasked with besieging Burgos were sent westward to join the action in [[Battle of Toro|Toro]] and Zamora.<ref name="Edwards2014" />
 
== Military history ==
The siege of Burgos was one of the last military engagements that saw the use of [[Trebuchet|trebuchets]], as [[gunpowder]] weaponry such as [[Cannon|cannons]] became increasingly common, and the siege is one of the last known references to their use.<ref name="Daumas1970">{{cite book|author=Maurice Daumas|title=A History of Technology & Invention: The first stages of mechanization|url=https://archive.org/details/historyoftechnol01daum|url-access=registration|year=1970|publisher=Crown Publishers|page=[https://archive.org/details/historyoftechnol01daum/page/103 103]}}</ref><ref name="Hall1997">{{cite book|author=Bert S. Hall|title=Weapons and Warfare in Renaissance Europe: Gunpowder, Technology, and Tactics|url=https://books.google.com/books?id=vyzcAAAAMAAJ|year=1997|publisher=Johns Hopkins University Press|isbn=978-0-8018-5531-3|page=21}}</ref> During the siege, [[Bombard (weapon)|bombards]] were used alongside trebuchets.<ref name="Crosby2002">{{cite book|author=Alfred W. Crosby|title=Throwing Fire: Projectile Technology Through History|url=https://books.google.com/books?id=vyFxldb2GJQC&pg=PA87|date=8 April 2002|publisher=Cambridge University Press|isbn=978-0-521-79158-8|page=87}}</ref>
 
== See also ==
 
* [[House of Zúñiga]], the garrison commander belonged to this noble lineage
* [[Siege of Burgos|Siege of Burgos (1812)]]
 
== References ==
{{Reflist|30em}}{{coord missing|Spain}}