Flag of Kyoseon

The flag of Dankuk, also known as the Taegeukgi, is the national flag of the Dankuk. There are three parts to the flag: a white background, a red, yellow, and blue Taegeuk, and four black trigrams. The Taegeukgi was adopted as the national flag in November 3610, aligning with the founding of the Kingdom of Dankuk.

In addition to the Taegeukgi there is also an imperial flag that was adopted in 3868 to represent not just the nation of Dankuk, but also the larger empire, which asserts domain over Kazulia (referred to as Jjeokuk) and the Kyo diaspora of Terra.

History
The first official flag of Dankuk was the Kyobando flag, associated with the Great Kyo Revolution of 3608. In the 3590s, Kyo ultranationalists led by Lee Dong-seung revolted against the government of Dranland, seeking the "re-Kyoification" of the peninsula. The revolution was a success and from 3608 to 3610 the flag of the revolution served as the national flag of the newly established Kyo state of Dankuk.

The Taegeukgi that replaced the revolutionary flag originated from early 3558 when it was created to serve as a flag to represent the Kyo ethnic identity in Dranland. The flag was embraced by the Kyo and its major community leaders. Alongside, and sometimes in place of, the Dranian flag, the ethnic flag was raised in many Kyo cities.

National Flag
The white background symbolizes peace and purity; and in general, the color white is very significant in Kamism, one of the major religions of Dankuk. The four trigrams have elemental meanings for heaven, fire, water, and earth. Additional meanings have been attributed to the trigrams, such as the four seasons or the four virtues of humanity, justice, intelligence, and courtesy. The taegeuk, also referred to as a sampa, represents humanity (yellow), heaven (red), and earth (blue).

Imperial Flag
The imperial flag's tricolor of black, blue, and red represents, respectively, darkness, earth, and heaven. The larger size of the blue field, which houses the imperial seal of the House of Ryeo, is symbolic of the struggle of the Kyo with overcoming centuries of hardships and restoring a righteous and harmonious kingdom. The imperial seal itself incorporates the four trigrams of the national flag and the plum flower, the historic symbol of the Kyo nation dating back to the ancient days of the Gongmangdo Kingdom. It features a dragon, both a symbol of benevolence and a reference to ancient Kyo mythology. Opposite to the dragon is a phoenix, symbolizing immortality and peace. At center is the head of an axe to represent courage and justice, and on it is a pentagram illustrating a rice ear for the importance of agriculture.