If the north was iron—
The south was water.
And water did not break.
It yielded, it curved, it swallowed.
The lands of Chu lay to the southeast, where the great rivers spread like veins across the earth before meeting the sea. Cities were not built around walls alone, but around docks, shipyards, and currents. Trade moved faster than armies. Wealth flowed not through roads—but through water.
And now, that water had become a wall.
From the northern watchtower, Liang scouts looked out over the river that marked the edge of Wu An's expansion.
It was not a simple river.
It was a system.
Wide enough that the far bank blurred into mist at dawn. Deep enough that even artillery could not easily be placed within effective range. The current moved steadily, silently, carrying with it patrol ships that watched every crossing.
And along the Chu side—
Fortifications rose.
Wood and stone towers reinforced with iron plating.
Cannon batteries facing the river, angled to fire not just forward, but along the length of the water.
Signal towers spaced evenly, so no movement could go unnoticed.
Chains beneath the water in certain sections, designed to tear apart ships that did not know their location.
And beyond all of it—
The navy.
In the capital of Chu, the court was nothing like Zhou.
No endless debates.
No fragile child emperor.
No crumbling nobility.
The King of Chu sat in a hall open to the river breeze, maps laid not of land—but of currents, wind, and tide.
He was the descendant of the southern king Wu An had once fought.
But he was not the same.
Where his predecessors had sought expansion—
He sought control.
Where they had marched armies north—
He had anchored his power in the rivers.
"Let them come," he had once said to his court.
"They will drown before they reach us."
Chu had not wasted the year.
Shipyards expanded across the southern rivers.
Warships were built larger, faster, reinforced to carry artillery along their decks.
River towers multiplied.
Cannons lined the banks.
Supply routes were secured through waterways that Liang could not easily disrupt.
And beyond that—
The King of Chu had done something even more dangerous.
He had spoken.
Not with threats.
But with offers.
Envoys moved quietly between courts.
To Wei—
Grain in exchange for naval protection.
To Jin—
Shared control of canal access in exchange for coordinated defense.
To Yan—
Trade privileges in southern ports in exchange for funding and mercenary fleets.
Chu did not need an alliance like Pei had tried to build.
Chu built something slower.
Something quieter.
A web.
Back in Beiliang City, the reports were laid out before Wu An.
Liao Yun spoke first.
"They've fortified every major crossing point."
Shen Yue added, "And their navy patrols constantly. Even small scouting boats are being intercepted."
Wu An did not respond immediately.
He studied the map.
But this time—
The map fought back.
There were no open plains.
No weak flanks.
No supply routes to easily cut.
Only water.
And water belonged to Chu.
"This is not our battlefield," Liao Yun said.
"No," Wu An agreed.
"It's theirs."
That was the problem.
Wu An had built his victories on movement, on speed, on breaking formations, on turning enemies against themselves.
But rivers did not panic.
Ships did not fracture like coalitions.
Water did not betray itself.
Shen Yue spoke quietly.
"If we force a crossing, we lose."
Wu An nodded.
"If we wait, they grow stronger."
"And if we ignore them?" she asked.
Wu An looked up.
"They strike us when we're weak," he said.
For the first time in a long time—
Wu An had found something he could not simply crush.
"The navy," Liao Yun said carefully.
"We don't have one."
"We have transports," Shen Yue added. "Not warships."
Wu An gave a faint smile.
"Then we build one."
That was easier said than done.
Ships were not forged like swords.
They were crafted.
Balanced.
Designed.
They required knowledge Liang did not yet possess.
They required commanders who understood wind, tide, current, and movement in ways land generals never needed to think about.
Wu An turned to the reports again.
"Who do we have?" he asked.
Liao Yun shook his head.
"No one capable of commanding a full naval campaign."
"Then we find them," Wu An said.
Orders went out across the realm.
Former Chu sailors.
Jin canal officers.
Pirates.
Merchants.
Shipbuilders.
Anyone with knowledge of water warfare was to be brought to the capital.
Rewarded.
Tested.
Used.
Wu An did not care where they came from.
Only what they could do.
At the same time, shipyards began to rise along Liang-controlled rivers.
Wood was gathered.
Iron shipped.
Labor conscripted.
Designs copied, stolen, adapted.
The first Liang warships were crude.
Heavy.
Unbalanced.
But they floated.
And they carried cannons.
Weeks turned into months.
The river remained unchanged.
Chu ships still patrolled.
Chu cannons still watched.
Chu towers still stood.
But now—
On the other side—
Something was beginning to take shape.
One evening, Wu An stood again at the northern bank of the great river, watching the distant silhouette of Chu's defenses.
Shen Yue stood beside him.
"You're not used to being the one who has to catch up," she said.
Wu An did not deny it.
"No," he said.
"But it won't last."
Far across the water, a Chu patrol ship turned slowly, its lanterns flickering in the dusk.
Watching.
Waiting.
Unafraid.
Wu An's eyes did not leave the river.
"On land," he said quietly, "we broke them by making them fight the wrong war."
He looked at the water.
"So we don't fight Chu's war."
Shen Yue frowned slightly.
"Then what war do we fight?"
Wu An smiled faintly.
"The one they're not ready for."
Behind him, the first of Liang's warships were being pushed into the water.
Crude.
Unproven.
But real.
For the first time—
The war was no longer about land.
It was about water.
And Wu An—
Had just stepped onto a battlefield where he was no longer the master.
But that had never stopped him before.