This is a timeline of the history of Korea. Some dates prior to the 6th century CE are speculative or approximate.
- 300 BC: Establishment of Jin in southern Korean peninsula.
- 238 BC: Establishment of Buyeo.
- 200 BC: Establishment of Samhan confederacies.
- 18 BC: Traditional date for the founding of Baekje by Onjo.
- 42: Traditional date for the founding of Gaya by Suro.
- 53: Goguryeo becomes a centralized kingdom under Taejo's reign.
- 105: Baekje and Silla sign peace treaty.
- 122: Goguryeo allies with the Mahan confederacy to attack Han China in Liaodong.
- 167: Baekje attacks Silla for harboring a Baekje court traitor.
- 188: Baekje expands into Silla territory, capturing several castles.
- 234: Baekje becomes a centralized kingdom under Goi's reign.
- 250: Goguryeo attacks Silla, signs truce.
- 346: Baekje's Geunchogo ascends to the throne, beginning the peak of Baekje's power.
- 356: Silla becomes a centralized kingdom under Naemul's reign.
- 384: Asin of Baekje officially adopts Buddhism.
- 400: Goguryeo supports Silla with 50,000 troops to repel Wae of Japan.
- 433: Baekje and Silla form an alliance against Goguryeo's aggression.
- 475: Goguryeo attacks Baekje and captures Hanseong (modern day Seoul). Baekje moves its capital south to Ungjin (modern day Gongju), and again to Sabi (modern dayBuyeo) in 523.
- 522: Silla begins absorption of Gaya.
- 540: Silla establishes the Hwarang, a military and religious order of youth.
- 551: Silla-Baekje forces attack Goguryeo, Silla captures Seoul.
- 553: Silla attacks Baekje, breaking the alliance.
- 562: Silla completes annexation of Gaya.
- 612: Goguryeo repulses second Sui invasion at the Salsu.
- 648: Silla establishes alliance with Tang.
- 660: Baekje falls to the Silla-Tang forces.
- 668: Goguryeo falls to the Silla-Tang forces.
Unified Silla and Balhae
- 676: Silla repels Chinese alliance forces from Korean peninsula, completes unification of much of the Three Kingdoms.
- 698: Former Goguryeo general Dae Joyeong repels Chinese forces from remainder of former Goguryeo territory, founding Balhae as a successor state.
- 892: Silla begins to lose control of parts of the peninsula as the brief Later Three Kingdoms period begins.
- 900: Hubaekje ("Later Baekje") established in the southwest of the peninsula.
- 901: Taebong ("Later Goguryeo") established in the northwest of the peninsula.
- 926: Balhae falls to Khitan forces!
- 935: Silla formally surrenders to Goryeo.
- 936: Hubaekje formally surrenders to Goryeo.
- 936: Goryeo completes the reunification of the Later Three Kingdoms, absorbing the remainder of Hubaekje and parts of Balhae territory.
- 956: Emperor Gwangjong forces major land and slavery reforms, and in 958 implements civil service examinations.
- 1033: Goryeo builds the Cheonri Jangseong, a massive wall running along the northern border.
- 1170: A violent coup results in a military junta effectively controlling the Goryeo court for the next 88 years.
- 1251: Goryeo completes the Tripitaka Koreana, the most comprehensive and oldest intact version of the Buddhist canon in Chinese script.
- 1270: Goryeo signs a peace treaty with the Mongols, beginning an 80-year period of suzereignty. The Sambyeolcho Rebellion lasts for three more years.
- 1388: General Yi Seonggye, ordered to engage China in a border dispute, turns his troops against the Goryeo court.
- 1396: Capital moved to Hanyang (modern day Seoul)
- 1402: Paper currency initiated
- 1408: High military service examination system created
- 1762: The tragedy of Crown Prince Sado (son of King Yeongjo)
- 1791: Persecution of Catholicism begins
- 1871: United States Asiatic Squadron has first military encounter with Korea in the Sinmi Yangyo.
- 1884: Kim Okgyun leads the Gapsin Jeongbyeon. In 3 days, Chinese forces are able to overwhelm the Progressives and their Japanese supporters.
The Korean Empire
-For a more descriptive timeline, look at the Timeline of the Korean Empire.
- 1897: 20 February. King Gojong returns to the palace after 1 year of refuge at the Russian legation.
- 1907: July 18. Gojong was forced to abdicate in favour of his son, Sunjong.
- 1909: October. Ito Hirobumi (the first Resident-General) is assassinated by Korean independence leader An Jung-geun.
Japanese Colonial rule
- 1919: March 1st Movement. Spurred by the sudden and mysterious death of Gojong. Declaration of Korean Independence. Nation-wide peaceful demonstrations are crushed by Japanese military and police forces after two months. Governor-General Hasegawa resigns.
- 1919: Saito Makoto appointed as third Governor-General of Korea. The period of "cultural policy" begins.
- 1926: 10 June Manse Independence Movement.
- 1932: Korean independence activist Lee Bong Chang fails in his attempt to assassinate Emperor Hirohito in Tokyo.
- 1932: Korean independence activist Yun Bong Gil bombs Japanese Military gathering in Shanghai.
Korea Divided (The Two Koreas)
- 1946: US-USSR Joint-Commission on the formation of a Korean Government reaches an impasse. The Joint-commission is dissolved as the Cold War begins.
- 1948: 10 May. UN sponsored elections are held in South Korea.
- 1949: The murder of Kim Gu. Kim Gu was a Korean Nationalist who believed in, and fought for, a unified Korea. He strongly objected to the formation of a separate South Korean state. He was shot in his home by a South Korean Army lieutenant.
- 1950: August. UN Forces are driven back to South-east corner of the Korean Peninsula (The Pusan Perimeter).
- 1950: November. Chinese Forces enter the war
- 1961: 12 November. Summit conference for normalization of Kor-Japanese relations
- 1967: start of the second Five-year plans of South Korea
- 1968: 5 December. Proclamation of the National Education Charter
- 1972: start of the third Five-year plans of South Korea
- 1972: 12 August. The first Red Cross talks between North and South Korea are held.
- 1972: President Park Chung Hee declares Emergency Martial Law and changes Constitution in August, which may allow him to become the permanent ruler. This is similar toGojong of the Korean Empire stating his country's governmental system as 'autocratic' in the constitution- for greater leadership and less opposition.
- 1976: 12 October: Discontinuation of rice imports, accomplishment of total self-sufficiency in rice by the 'Unification Rice'
- 1977: start of the fourth Five-year plans of South Korea
- 1977: 22 December. Celebration of achievement of 10 billion dollars gained by exports.
- 1978: 26 October. Detection of 3rd underground tunnel. Made by North Korea to attack South Korea.
- 1978: 10 December. Achievement of 1,117 US dollars as GNP.
- 1979: American president Jimmy Carter visits Korea. Threatens Park by stating he would reduce the US forces in Korea if he does not stop the ongoing Nuclear Weapons Development project.
- 1980: The Gwangju Uprising. Martial Law is declared throughout the nation. The city of Gwangju becomes a battleground between dissenters and the Armed Forces (18–27 May). Some reports claim over 100 casualties.
- 1998: Taepodong-1, a two-stage intermediate-range ballistic missile is developed and tested by the DPRK. End of the Arduous March. It is possible that up to 3.5 million people did not survive the 'march'.
- 1999: The DPRK promises to freeze long-range missile tests.
- 2002: The 2002 FIFA World Cup jointly held by Korea & Japan. The Korean National Team makes it to the semi-finals for the first time in Korean history. The DPRK pledges to extend moratorium on missile tests beyond 2003.
- 2004: The DPRK reaffirms moratorium.
- 2005: The DPRK fires short-range missile into the East Sea.
- 2007: The second summit between DPRK and ROK leaders is held, with Roh Moo-hyun representing the south and Kim Jong Il the north. The DPRK fires short-range missile into the East Sea.
- 2008: A south Korean tourist, a women in about her 50s, is shot down by a DPRK soldier for 'going into military territory' at 4 AM, in Keumgang Mountain Tourist Region. This causes immediate uproar and all tourism into North Korea is suspended after the incident.
- 2011: Kim Jong Il dies, Kim Jong un takes over as the Supreme Leader of North Korea. The National Intelligence Service discovers Communist spies who have been working underground for the DPRK for almost 10 years. One of the members was a former Democratic Party representative.Their mission was to influence the party named above and extract military secret information.