Editing History of Korea (section)

===Bronze Age===
The [[Bronze Age#Korea|Bronze Age in Korea]] is often held to have begun around 900–800 BC,<ref name="Connor" /> though the transition to the Bronze Age may have begun as far back as 2300 BC.<ref name="Kim and Bae" /> Bronze daggers, mirrors, jewelry, and weaponry have been found, as well as evidence of walled-town polities. Rice, red beans, soybeans and millet were cultivated, and rectangular pit-houses and increasingly larger [[dolmen]] burial sites are found throughout the peninsula.<ref>[https://whc.unesco.org/en/list/977 Gochang, Hwasun and Ganghwa Dolmen Sites] {{webarchive|url=https://web.archive.org/web/20170218153900/https://whc.unesco.org/en/list/977/ |date=2017-02-18 }}, UNESCO</ref> Contemporaneous records suggest that Gojoseon transitioned from a feudal federation of walled cities into a centralised kingdom at least before the 4th-century BC.{{sfn|Lee|Park|Yoon|2005|pp= 82–85}} It is believed that by the 4th century BC, [[Iron Age|iron culture]] was developing in Korea by northern influence via today's [[Primorsky_Krai|Russia's Maritime Province]].<ref>{{cite web|url=https://www.researchgate.net/publication/251565346|title=Large-scale 2nd to 3rd century AD bloomery iron smelting in Korea}}</ref><ref>Wontack Hong, "The Yemaek Tungus of Central Manchuria and Korean Peninsula: Interactions between the Xianbei and the Yemaek Tungus"</ref>