The gwageo (Korean: 과거) or kwagŏ were the national civil service examinations under the Goryeo (918–1392) and Joseon (1392–1897) periods of Korea. Typically quite demanding, these tests measured candidates' ability of writing composition and knowledge of the Chinese classics. The form of writing varied from literature to proposals on management of the state. Technical subjects were also tested to appoint experts on medicine, interpretation, accounting, law etc. These were the primary route for most people to achieve positions in the bureaucracy.

Goryeo was a Korean state founded in 918, during a time of national division called the Later Three Kingdoms period, that unified and ruled the Korean Peninsula until 1392. Goryeo achieved what has been called a "true national unification" by Korean historians as it not only unified the Later Three Kingdoms but also incorporated much of the ruling class of the northern kingdom of Balhae, who had origins in Goguryeo of the earlier Three Kingdoms of Korea. The name "Korea" is derived from the name of Goryeo, also romanized as Koryŏ, which was first used in the early 5th century by Goguryeo. According to Korean historians, it was during the Goryeo period that the individual identities of Goguryeo, Baekje and Silla were successfully merged into a single entity that became the basis of the modern-day Korean identity. Goryeo was the successor state to Later Goguryeo and Goguryeo.