Before the dinvision
Korean history begins with the founding of Chosun (often known as "Gojoseon" to prevent confusion with another dynasty founded in the 14th century; the prefix Go- means 'older,' 'before,' or 'earlier') in 2333 BC by Dangun, according to Korean foundation mythology. Gojoseon expanded until it controlled northern Korean Peninsula and some parts of Manchuria. After many conflicts with the Chinese Han Dynasty, Gojoseon disintegrated, leading to the Proto–Three Kingdoms of Korea period.
In the early centuries of the Common Era, Buyeo, Okjeo, Dongye, and the Samhan confederacy occupied the peninsula and southern Manchuria. Of the various states, Goguryeo, Baekje, and Silla grew to control the peninsula as Three Kingdoms of Korea. The unification of the Three Kingdoms by Silla in 676 led to the North South States Period, in which much of the Korean Peninsula was controlled by Unified Silla, while Balhae succeeded to have the control of northern parts of Goguryeo.
In Unified Silla, poetry and art was encouraged, and Buddhist culture thrived. Relationships between Korea and China remained relatively peaceful during this time. However, Unified Silla weakened under internal strife, and surrendered to Goryeo in 935. Balhae, Silla's neighbor to the north, was formed as a successor state to Goguryeo. During its height, Balhae controlled most of Manchuria and parts of Russian Far East. It fell to the Khitan in 926.
The peninsula was united by Emperor Taejo of Goryeo in 936. Like Silla, Goryeo was a highly cultural state and created the Jikji in 1377, using the world's oldest movable metal type printing press. The Mongol invasions in the 13th century greatly weakened Goryeo. After nearly 30 years of war, Goryeo continued to rule Korea, though as a tributary ally to the Mongols. After the Mongolian Empire collapsed, severe political strife followed and the Goryeo Dynasty was replaced by the Joseon Dynasty in 1392, following