
Introduction: A Kingdom Built on a Foundation of Blood
Most people know South Korea for its sleek skyscrapers and K-pop idols, but the foundation of this nation was laid in a much darker era. In 1392, a legendary general named Yi Seong-gye overthrew an empire to establish the Joseon Dynasty, a monarchy that would last for over 500 years.
However, the transition of power wasn’t a peaceful ceremony. It was a chaotic, fratricidal war. If you think the Lannisters from Game of Thrones were ruthless, you haven’t met the Yi Family. This is the story of how a kingdom meant to be a Confucian utopia began with a midnight massacre.
The Architect vs. The Warrior – Two Visions for One Nation
To understand why the blood started flowing, you have to understand the clash between two brilliant minds: Jeong Do-jeon (The Architect) and Yi Bang-won (The Warrior Prince).
Jeong Do-jeon’s Dream of a Minister-Led State
Jeong Do-jeon was the mastermind behind the revolution. He didn’t want a king with absolute power. Instead, he envisioned a system where scholars and ministers governed the country, with the King serving as a mere symbolic figurehead. To ensure this, he convinced King Taejo to appoint his youngest, most pliable son as the Crown Prince.
Yi Bang-won’s Ruthless Ambition
Yi Bang-won, the fifth son of the King, was the man who actually did the dirty work to put his father on the throne. He was a brilliant strategist and a cold-blooded warrior. When he realized he was being sidelined in favor of his half-brother, he didn’t just complain—he prepared for war.
“In the game of Joseon politics, you either rule with an iron fist or you disappear from the history books.”
The First Strife of Princes (1398) – The Night of the Long Knives
On a humid night in 1398, while King Taejo was ill, Yi Bang-won launched a preemptive strike that would change Korean history forever. This event, known as the First Strife of Princes, was a surgical elimination of his political rivals.
- The Assassination of Jeong Do-jeon: Bang-won’s forces surrounded the residence of the great architect and executed him on the spot, ending the dream of a minister-led state.
- Fratricide in the Palace: Bang-won didn’t stop there. He tracked down his half-brothers—the Crown Prince and his younger brother—and slaughtered them to ensure no other bloodline could claim the throne.
This wasn’t just a coup; it was a statement. Bang-won proved that in the new Joseon, power belonged to the one brave enough to take it.
A Father’s Despair – When the King Realized He Created a Monster
Imagine being King Taejo. You’ve spent your entire life on the battlefield, finally carving out a new nation, only to watch your own son butcher your other children in the very palace you built.
The relationship between Taejo and Bang-won is one of the most tragic “Father-Son” dynamics in world history. Taejo didn’t see a successor in Bang-won; he saw a cold-blooded usurper. This tension is so thick it practically screams for a cinematic adaptation—and luckily, Korean cinema has delivered.
Cinematic Masterpieces: Watching the Bloodline Unravel
To truly feel the “vibe” of this brutal era, you need to see how modern directors have reinterpreted these historical titans. These aren’t just history lessons; they are psychological thrillers.
1. The Age of Innocence (순수의 시대, 2015) – The Raw Hunger for Power
If you want to see the First Strife of Princes in all its gritty, R-rated glory, this is the movie.
- Why it works for you: It portrays Yi Bang-won (played by Jang Hyuk) as a man who is literally trembling with suppressed rage and ambition. It captures the “Game of Thrones” style of court politics—where a single dinner party can end in a bloodbath.
- SEO Hook: Best Korean historical movies for Game of Thrones fans.
2. Six Flying Dragons (육룡이 나르샤, 2015-2016) – The Evolution of a Tyrant
While this is a long-form drama, it is widely considered the “Gold Standard” for understanding Yi Bang-won’s psychology.
- The Plot: It follows six individuals who shaped the destiny of Joseon. You watch Bang-won evolve from a passionate young revolutionary into a man who realizes that to “save” the country, he must become the villain.
- Key Scene: The moment Bang-won decides to kill his mentor, Jeong Do-jeon, is a masterclass in tragic storytelling.
The Legacy of the “King of Swords”
Eventually, Yi Bang-won took the throne as King Taejong. Was he a villain? Or was he the “Necessary Evil” that Joseon needed to survive its infancy?
Taejong’s reign was defined by the removal of private armies and the centralizing of power. He did the “dirty work” so that his son—who would become the legendary King Sejong the Great—could rule a stable, peaceful nation and create the Korean alphabet (Hangul).
“Taejong paved the road with blood so his son could walk on flowers.”
Conclusion: Who is the Real Villain?
History is written by the survivors, and Yi Bang-won survived them all. But at what cost? He died powerful, yet isolated, having killed his friends, his brothers, and even his in-laws to protect the throne.
Next Episode Preview: In the next chapter, we move from the “Warrior King” to the “Genius King.” But don’t be fooled—the golden age of King Sejong had its own dark shadows. We’ll look at the movies “The King’s Letters” and “Forbidden Dream” to see the man behind the myth.

Frequently Asked Questions about the Joseon Dynasty’s First King
- Q: Who was the first king of the Joseon Dynasty?
- A: King Taejo (Yi Seong-gye) founded the Joseon Dynasty in 1392 after the fall of the Goryeo Dynasty.
- Q: Why did Yi Bang-won kill his brothers?
- A: He initiated the First Strife of Princes to eliminate political rivals (Jeong Do-jeon) and half-brothers who were appointed as successors over him.
- Q: Is “The Age of Innocence” historically accurate?
- A: While it dramatizes the romance, the core political conflict and the portrayal of Yi Bang-won’t ruthlessness are based on true historical records from the Joseon Wangjo Sillok (Annals of the Joseon Dynasty).