257.
Training the Self-Defense Corps — Tactics Woven of Soil, Horse, and Wind
On days without official business, Hwaju was noisier than ever.
Drums thundered across the fields beyond the walls, and hooves tore at the earth.
The men summoned to the self-defense corps mounted their horses, and the level plain became, overnight, a vast training ground.
Park Seongjin watched from the battlements.
On one side stood the Jurchen cavalry; on the other, Goryeo infantry.
They shared the same banner, yet their breathing was different.
"The horses are too fast," the infantry captain complained.
"Our feet can't keep up."
The Jurchen officer shook his head.
"Cavalry die when they stop. We shoot while running. We do not fight at a standstill."
Two traditions collided head-on.
Park Seongjin observed in silence for a long while, then raised his hand.
"Run—!"
At the signal, hooves ripped through the field.
The Jurchen cavalry charged, loosing arrows; the Goryeo infantry followed.
In the dust, the formation seemed to scatter in an instant.
But Park Seongjin's gaze did not waver.
"Now!"
The drum sounded.
The infantry split left and right.
Through the opening, the cavalry surged, and at once the infantry folded inward.
Speed and density interwove.
Infantry dropped to avoid arrows; cavalry skimmed over them, striking as they passed.
As the cavalry peeled away, the infantry rose, shields set, blades swinging.
It looked like chaos, yet a clear rhythm pulsed within.
Cavalry entered the infantry's shielded mass to catch their breath; infantry bound the enemy with shields and heavy crossbows.
Meanwhile, the cavalry that had slipped free circled the flank and struck again from behind.
Armored horses did not fall easily.
The infantry did not give ground.
When the drill ended, everyone stood gasping, drenched in sweat.
White steam rose from the horses' nostrils.
Park Seongjin descended from the wall at a measured pace.
"What you just saw—that's what we were looking for."
The Jurchen cavalry captain asked,
"Is this a formation?"
Park Seongjin stroked a horse's neck and shook his head.
"I don't know that it is."
He gestured toward the field.
"Horses are fast, people are slow. Force them to match and everything goes awry.
Cover one another's gaps, and you live."
Days later, the combination began to be called the Hwaju Formation.
It bound Jurchen mobility to Goryeo shield-walls.
The infantry did not fix themselves in place.
They folded and opened with the cavalry's flow.
Cavalry used arrows to open space rather than merely to kill.
Attack and defense were no longer separate.
The formation was less a technique than a current.
As winter approached, training continued daily.
Chanted regulations mingled with horses' breath;
at night, by the campfires, Jurchen songs and Goryeo drums sounded together.
Their languages differed, but the place they stood did not.
Watching the firelight, Park Seongjin murmured,
"This isn't chance. We're stronger because we are different."
As more Jurchen joined, mobile warfare grew steadier still.
Having fled the Empire's shadow, they were relentless in training.
The Second-Month Lord Stands on Hwaju's Snow-Covered Fields
On the first day of the new year, snow fell.
A new banner fluttered atop Hwaju's walls, and beneath the gate the self-defense corps swore their vows.
Snow descended evenly, burying all sound.
Now nineteen, Park Seongjin gazed down—and lifted his head at a strange tightening in his chest.
From far off, through the snow, a single horse approached at a slow pace.
Black robe, white hair.
Each hoofstep parted the snow without sound, and even those prints were soon covered again.
It was as if an old memory had stepped into the present.
Park Seongjin's lips trembled.
His eyes widened.
"…Master?"
Yi Wol-gun did not answer.
He dismounted and walked quietly across the snow.
The gaze was unchanged—stern and warm, a look that read a person's depths without a word.
Park Seongjin tried to step forward, then froze, as if his feet had turned to ice.
Words failed him.
Since childhood he had learned the world's answers from this man, yet now no speech could explain the moment.
His hands moved first.
He brought them together before his chest and bowed with precision,
then prostrated himself deeply.
"Your disciple, Park Seongjin, greets his master."
His forehead touched the snow.
Cold brushed his skin, and something hot burst from his chest—tears.
"I'm late… far too late, Master."
Yi Wol-gun smiled softly.
"Late? You are still only nineteen."
At that, Park Seongjin's shoulders shook.
"The world changed too quickly. People died, land changed hands… I—I feel as though I've become an army instead of a person."
Yi Wol-gun looked across the snow-covered field for a moment and nodded.
"That can happen."
Then he added,
"When a sword loses the body that wields it, it is nothing but metal.
When a person loses the heart, he is no different from a beast."
His gaze returned to Park Seongjin.
"You still carry the sword in your chest."
Park Seongjin lifted his head and smiled like a child through tears.
"I… I still can't put it down."
Yi Wol-gun pressed a hand lightly to his shoulder.
"Then that is enough.
If you carry the sword within, you are still on the path."
Park Seongjin considered explaining the poison he had suffered, the disruptions of his inner flow—but stopped.
What use was it to whine before his master?
After a quiet breath, Yi Wol-gun spoke low:
"Birds have many days to fly. Why such haste?"
The words settled his heart.
He thought of the time he had neglected study, distracted by events.
They stood facing one another in silence.
The wind rose; snow scattered, erasing their footprints one by one.
Park Seongjin bowed again, kneeling on the snow, and bowed deeply once more.
"Master… I missed you."
Yi Wol-gun said quietly,
"You must now walk farther than I ever did. Get up."
It was a kind of acknowledgment.
Only when a disciple leaves the master's embrace does he truly become a disciple.
You know the worth of something only after it is gone.
Park Seongjin bowed again—
he could no longer count how many times—and said,
"I will do my utmost."
On the snow-covered field, the two shadows stretched long.
The wind passed over them, carrying echoes of earlier days.
"Spring will come," someone said. "Soon."
The people of Hwaju, witnessing Park Seongjin's reverence without knowing who the visitor was, quietly caught their breath and bowed their heads.
Later, when they learned the word master, they praised General Park's devotion.