The Great Empire of Koryŏ
"In 1388, the great General Choi Yeong defeated the traitorous Ni Seong-kye in defense of the capital, defending King Wangmin, a monarch with little legitimacy. Wangmin had ascended the throne after the murder of his father by pro-Yuan bureaucrats, at only the age of 11. By 24, Wangmin had built little legitimacy, but Choi Yeong was a dedicated Confucian who believed in obeying his rightful lord. However, in 1392, Wangmin suffered an infection from a hunting wound. Dying in agony, his fever-induced madness lasted almost a year, and sent him into a rage, easily manipulated. He ordered his own son's death, and removed numerous administrators from their positions. While many of these orders were ignored, enemies of the ailing king used his written orders for his son's arrest to lock the boy away. Strongly opposed to corruption and disgusted by the political power grabs at hand, upon the death of King Wangmin, General Choi leapt into action.
He freed the young Prince Chang, and escorted him away from the capital. The bureaucrats claimed Chang had been kidnapped, and when he died of illness a few months following the escape, they claimed Choi had him murdered. However, Choi's own men had already spread their story faster. Choi was a hero, rescuing the prince from would-be murderers. With the death of the heir, the bureaucrats named one of their own, No Hyeon-jo, as King. While initially demoralized, Choi acted to depose the new King, if only to lead a regency that would seek a more legitimate heir. However, the recent conflict had seen a great of violence and death between the nobility of the kingdom. Choi found that the closest heir he could find was granddaughter and grandson of a royal bastard. Their names were Wang Ji-woo and Wang Hyeong-don. Hyeong-don was a brash man, but got along well enough with Choi. For five years, Hyeong-don reigned bloodily but fairly, purging his regime. Choi would meanwhile remarry with Wang Ji-woo. But the King's reign would not last. 1399, the king suffered a sudden stroke. Choi Yeong took this as a sign. The King had named the great general as his heir while he awaited the birth of a child..."
- The Great General, The Great Father by Kim Hyeong-pak
"...Thus Choi Yeong ascended the throne, reluctant but at last ready to claim his destiny. In his reign, he would join the Ming Dynasty in a war against the Jurchen, and would negotiate rights to the ports of Liaodong. However, the ongoing collapse of the Ming Dynasty into the Southern and Northern Ming, later the Southern Ming and the Zhu Dynasty, would mean that these fishing rights would morph into unofficial administration...
...Upon his death, despite never desiring expansion, King Jojeong, as Choi styled himself, had gained control of the Liaodong peninsula. This would prove instrumental in the strategies of his son, Choi Gong, who would press northward in expansion against the uncontained Jurchens, before negotiating an alliance with the Zhu Dynasty. The Southern Ming saw this as a betrayal, but the Zhu would later feel snubbed themselves when Choi Gong declared himself Emperor of Great Koryŏ, an equal with the Zhu Emperor..."
- History of the Koryoan-Chinese Wars by Tammy MacDurgan
"...Three generations later, the Zhu would unify China, but their weakened position saw them lose territory on all sides. Focusing south, moving their capital to Nanjing, the Zhu and Koryŏ would begin a lengthy rivalry only interrupted by a temporary alliance to crush the upstart Japanese...
...Koryŏ would eventually seize much of Northern China is the Third Koryoan-Chinese War in 1801. By this point in time, the Zhu Dynasty would crumble to the Christian Jingtian Dynasty, as Catholicism had come to dominate the south. The Jingtian would become a puppet of the Franco-Italians, with ports open to the other great European empires, like the Swedes, British, and Greeks...
...Koryŏ thus became the center of Asian power. The three Japanese Shogunates would all become vassals before being absorbed into the Empire in 1881. Koryŏ would expand West and annex the forgotten Russian settlements of the Far East. It would finally take winning a war with the declining British Empire in 1904 to finally garner international respect, creating a vassal state in Bengal and annexing Formosa. Even the Jingtian have become a member of the Koryŏ-led Asian Co-Prosperity Society, though the Leveller-state of the Indochinese Equalist Commonwealth has become a regional rival by 1950."
- Pax Caulia by Rosalie de Londe
"...The flag of Koryŏ has stayed mostly the same throughout this. Derived from the royal standard of the Kingdom preceding it, the use of two phoenixes has become a cultural symbol of Koryoan people...
...Confucianism has always been a prominent faith, even during the Reign of the Five Taoist Emperors, the Chinese origins of the faith, combined with a steady gain of Chinese territory over the centuries, resulted in Chinese traditions being found on the Koryŏ flag. Yellow, representing the center and the Earth, was used as a base of the flag...
...The two phoenixes, initially meant to represent the second rebirth of the Kingdom into the Empire, would gain contrasting colors as they became fused with the popular symbol of the taeguk. Meanwhile, the center of the flag would bear the mark of central symbol of Fengshui. Fengshui has been utilized in numerous official buildings, and many cities constructed during the 19th Century were planned extensively to have Fengshui at the center of the entire layout. The black border originally was used to represent the borders of the frontier, cold and endless in every direction except south, black being a color representing winter..."
- The Little Book of Flags, 3rd Edition, by Patrick K. R. Fitzgerald