"I suppose you could call that destroying a nation in one move."
Liu Bei said this with the specific flatness of a man who has been amazed so many times that the machinery for amazement has temporarily stopped responding.
When the light screen first started covering the Tang's military record, he had felt genuine admiration.
That admiration had evolved through shock, then awe, and had now arrived somewhere quieter. Looking at the list of conquered states flickering across the projection, his internal state had settled into the stillness of a very deep pond.
Tuyuhun. Xueyantuo. Eastern Turks. Gaochang. Kucha. Western Turks.
Just as the narrator Wen Mang had observed, a Tang victory was no longer surprising. It was the expected outcome.
It was the natural order of things.
"This is truly what it means to inherit and wield the fierce legacy of Emperor Taizong," Zhuge Liang said quietly.
He turned away from the screen, his mind working. The tactical record looked like an unbroken chain of brilliant victories, but Zhuge Liang could see the political tightrope strung between each battle. He saw the precise timing, the alignment of conditions, and the invisible labor that made the grand strategy function.
Li Shimin had weaponized the title of Heavenly Khan. He used it as a remote control operating from thousands of li away, manipulating the internal politics of the Western Turks from the comfort of Chang'an. The approach was elegant: support the weaker factions, suppress the dominant warlords, let the Turkic branches grind each other down from the inside. Only then did the Tang extend its hand to clean up what remained.
Zhuge Liang could almost see them. Dozens of Tang diplomats whose names the official histories never bothered to record, riding exhausted horses through mountain passes, quietly turning the gears of geopolitics for years until the mechanism was ready.
But there is a deeper lesson here. One that even the Tang seems to have missed.
They absorbed the steppe peoples. They made them generals. They made them dukes. They gave them power. And for a while, it worked beautifully. The Turks fought for Tang. They died for Tang. They expanded Tang's borders.
But the same system that brought them in also gave them the tools to destroy the empire from within. An Lushan was not a foreign invader. He was a Tang general. He knew the empire's weaknesses. He exploited them. He almost brought the Tang to its knees.
This is the contradiction the Tang never resolved. You cannot bring the wolf into the sheepfold and expect it to become a sheep.
The Han understood this. They built walls. They kept the nomads out. They survived longer, but they never truly expanded beyond the steppe's edge.
The Tang brought the nomads in. They expanded further than anyone, but they planted the seeds of their own destruction.
Is there a middle path? Can you integrate without being consumed?
He thought about the overall timeline and felt another wave of something close to awe.
"Emperor Taizong lived only fifty years. In that time, he pacified a fractured realm, governed an empire, reclaimed the Western Regions, and launched major campaigns into Liaodong."
He turned his fan in his hand slowly. "Most men would build a legendary legacy from just one of those achievements. To accomplish all of them in a single lifetime is something else entirely. It is not difficult to understand why later generations place him at the top of the list."
Zhang Fei nodded with his whole upper body, beard bouncing. He felt genuinely inspired. Then his brain made a connection that his mouth began acting on before the rest of him could intervene.
"Speaking of fifty years," Zhang Fei said, turning toward Liu Bei with the momentum of a man arriving at a very important observation, "I just remembered that big brother's age is already..."
Liu Bei did not blink. His hand shot out and smacked Zhang Fei on the back of the head, severing the sentence cleanly.
"Which is exactly why we must fight even harder!" Liu Bei said, at a volume slightly higher than the room required. "Following the examples of Su Dingfang and Li Jing, achieving greatness past fifty is entirely possible!"
Zhang Fei closed his mouth. He blinked twice. He rubbed the back of his head and gave a small, uncertain nod. "Right. That is what I was going to say."
Liu Bei stared at him. "Really?"
"Yes, big brother. I was going to say that fifty is just a number. Su Dingfang was fifty-seven when he led that campaign. So we still have time."
Liu Bei continued staring.
Zhang Fei looked back, his expression perfectly innocent.
"You were going to say that," Liu Bei repeated slowly.
"Yes."
"Not something about my age?"
"No, big brother. I would never bring up your age."
"Good."
Liu Bei produced a laugh that convinced nobody.
Zhuge Liang pressed his hand over his mouth and looked at the ceiling.
Fa Zheng had already stopped paying attention to any of this. His eyes were fixed on the tactical breakdown of Su Dingfang's engagement against the Turkic cavalry.
"The Tang military is not simply exceptional at deploying cavalry," he said, rubbing his chin. "They are extraordinarily good at destroying it."
On the journey back to Chengdu with Zhang Fei, Fa Zheng had spent considerable time extracting information about the situation in Yong and Liang.
Han Sui had fled into the deep wilderness.
According to what he had heard, Pang Tong was attempting to maneuver Han Sui onto the Tibetan Plateau, framing it as the most patriotic possible interpretation of his title General Who Conquers the West. Which was, charitably, one way to describe being sent into the middle of nowhere as an involuntary vanguard.
That left Ma Chao as the primary stabilizing force in the western regions. Ma Chao and his officers had developed a deep and apparently genuine respect for the diplomat Jian Yong, and with Pang Tong's influence layered on top, the western flank was essentially settled.
The only serious remaining variable on the board was Wei general Xiahou Yuan and the ten thousand elite cavalry he currently garrisoned at Chang'an.
Zhuge Liang tracked the line of thinking without needing it explained.
"Su Dingfang was significantly outnumbered," he said, tapping his fan against his palm. "Because of that imbalance, he deployed a pure spear infantry formation with one objective: make his force impossible to destroy. Only after surviving the initial shock did he look for a counterattack opening."
He paused, visualizing the central plains terrain. "If we deploy onto the Guanzhong plains without that kind of numerical disadvantage, we could combine this Tang approach with the traditional Han formations developed against the Xiongnu."
He continued building the picture as he spoke. "A layered center: bows in front, then crossbows, then heavy long spears, then shock infantry with bladed polearms behind them. Light cavalry strictly on the flanks, ready to encircle and chase."
Fa Zheng nodded slowly, carving the doctrine into memory.
[Lightscreen]
[Now, let us talk about what the Tang actually got out of all this. Because the numbers are genuinely staggering.
The Tang had invested considerable patience into their long campaign against the Western Turks, chipping away systematically for years. It was not a quick war. It was an slow, grinding dismantling of an empire piece by piece.
The final return was substantial. Over four hundred thousand prisoners and livestock secured. Four hundred thousand. Let that number sink in.
But the real prize was territorial. From the edge of the Western Regions all the way to the Aral Sea, the Tang established two massive administrative zones: the Mengchi Protectorate and the Kunling Protectorate.
Now, here is where it gets interesting. The official dividing line between the two was the Chu River. And the origin of that name connects directly to an older story. A story that belongs to the Han dynasty.
This river, located in what is now Kyrgyzstan, carries history that belongs to the Han dynasty.
Before the Western Han era, it was simply called the Sai River. Named after the Sai people who lived there. Simple. Functional. Boring.
Then came the Xiongnu civil war.
During the early reign of Emperor Yuan of Han, the already weakened Xiongnu empire tore itself apart. Huhanye Chanyu surrendered and submitted to the Han. His rival, Zhizhi Chanyu, fled west to build independent power.
Watching Huhanye settle comfortably into Han patronage, Zhizhi looked at the abandoned territory and reached a simple conclusion: free land. He began absorbing it.
The problem was that Huhanye came back with Han military backing and systematically crushed every faction willing to bare its teeth at the Han standard.
Furious and humiliated, Zhizhi fled further west. But before leaving, he made a critical error.
He wrote a groveling letter to Emperor Yuan requesting the return of his hostage son. The emperor agreed. The moment Han envoy Gu Ji delivered the boy, Zhizhi killed the diplomat on the spot and kept running to the territory of Kangju.
Now, let us pause and appreciate this. You kill a Han diplomat. You think you can just run to the other side of the world. You think geography will protect you.
You are wrong.
In the third year of the Jianzhao era, Protector General of the Western Regions Gan Yanshou and his deputy Chen Tang led an expeditionary force straight into Kangju.
Zhizhi had a brief window to run. He looked at the exhausted Han army that had marched thousands of li, assumed they could not sustain a siege, and decided to hold his position.
This was a fatal miscalculation.
The Han military explained, with complete thoroughness, why that assumption was wrong. They encircled the fortress. The outer walls came down. The inner citadel was breached. Fires burned on all four sides and the drums did not stop. Zhizhi Chanyu was cornered in the deepest part of his own palace and decapitated by the acting military magistrate Du Xun.
When Chen Tang returned to the capital to report the victory, his memorial contained the line that later generations would repeat for two thousand years:
*Those who dare offend the mighty Han shall be executed, no matter how far they run. *
This is not just a famous quote. This is a warning. This is a statement of intent. This is the Han dynasty telling the entire world: You can run. But you cannot hide.
After the fortress fell, Chen Tang ordered his troops to build a garrison near the Sai River to anchor the new border. Because a large portion of the expeditionary force had come from the Chu region of China, the homesick soldiers renamed the river after their homeland.
Nearly seven hundred years later, the Tang reclaimed that exact same soil. They used the Chu River as the formal boundary between their new protectorates, honoring the name the Han soldiers had given it.
Seven centuries apart. Two dynasties. The same river. The same soil.
This is what happens when you build an empire that lasts. The Han built it. The Tang reclaimed it. And the river still carries the name the soldiers gave it.
That is not just history. That is legacy. ]
Liu Bei felt moisture at the corners of his eyes. He was not the only one.
Every man in the Chengdu government hall felt the same charge move through him. The Han had been that dynasty. The legacy that the Tang honored by naming a river after it, the standard that later generations measured themselves against, that had been theirs. They had gathered in this room, fought through decades of civil war, and bled on more battlefields than any of them could easily count for one reason: to make sure the Han continued to be that.
Zhang Fei brought his fist into his open palm with a crack that echoed off the walls. Something had crystallized.
He did not need the border to reach the Aral Sea tomorrow. But he was going to lead an army out there eventually. He was going to find some foreign warlord who needed to be reminded of something, spill their blood on the steppe, and pour a bowl of wine into the dirt for Chen Tang and every soldier who had come before him.
Zhuge Liang, who knew the history of the Western Regions well, allowed a touch of irony into his voice.
"Looking at the records carefully, Gan Yanshou and Chen Tang were technically diplomats, not frontline military commanders."
Liu Bei took a breath and steadied himself. He picked up the thread.
"At the time, the two men were escorting a diplomatic mission through the Western Regions with a small guard contingent. When Chen Tang determined where Zhizhi Chanyu was hiding, he saw the window. He proposed bypassing imperial authorization, mobilizing the local border garrisons, and drafting auxiliary troops from the vassal states for an immediate surprise assault."
"Gan Yanshou agreed with the tactical assessment but insisted on sending a formal request to the capital first. Chen Tang argued that by the time the paperwork cleared, the opportunity would be gone. Military windows do not wait for bureaucratic process."
Fa Zheng picked up a peanut and looked at it with a specific kind of appreciation.
"And the execution is the most beautiful part. While the two diplomats were screaming at each other about military regulations, Gan Yanshou conveniently developed a severe illness."
He tossed the peanut into his mouth. "Chen Tang did not waste a moment. He forged an imperial decree using the sick commander's name, illegally drafted the border garrisons, mobilized the armies of Wusun and Jushi, scraped together forty thousand men, marched to the edge of the known world, and personally removed the Zhizhi Chanyu from existence."
He shook his head with the look of a man who respects craftsmanship when he sees it.
As a strategist who had occasionally bent procedural rules himself, Fa Zheng was not in a strong position to deliver moral lectures about forging imperial edicts. He was also aware that scholars like Cui Shi had blamed Emperor Yuan's permissiveness for planting seeds of the Han's eventual decline.
But Emperor Yuan's actual response to this particular illegal military miracle was worth noting. He pardoned the forged decree. He made Gan Yanshou Marquis of Yicheng and Colonel of the Changshui Cavalry. Chen Tang received the title Marquis of Guannei and the position of Colonel of the Archers Who Shoot at Sound. Both men received estates of three hundred households and one hundred jin of gold.
"It is a profound tragedy that later generations could not hold that river," Liu Bei said softly.
He stopped. He shook his head.
"No. They survived the fragmented Song era. They survived the Mongol invasions. The Hexi Corridor dried out and died. You cannot blame people for failing to hold ground where survival itself became impossible."
Wen Mang had made the future clear. By the Ming dynasty, large portions of the Hexi region had become desert. No water, no soil. When basic existence stopped being viable, holding an arbitrary boundary line was an absurd demand.
Liu Bei brought his hand down on the table. His eyes were steady and clear.
"But in our timeline, the Hexi Corridor is still green. The water flows. The grass grows. We are not going to fall behind."
The hall answered him together, loud enough to shake the dust loose from the rafters.
[Lightscreen]
[A man cannot be unlucky forever. Su Dingfang proved that personally.
In 658 CE, he destroyed the Western Turkic Khaganate. One year later, in 659 CE, another assignment arrived on his desk.
Someone had started a rebellion in the Pamir Mountains.
After spending the previous year parading the captured Shaboluo Khan through victory ceremonies, Li Zhi was in an excellent mood. Su Dingfang was equally eager to return to the field.
By this point, Li Zhi had identified him as the most dependable weapon in the Tang military arsenal. The two understood each other perfectly.
The emperor handed Su Dingfang ten thousand infantry and three thousand elite cavalry and ordered him to march west and restore order.
Officially, it was a pacification campaign. In practice, everyone involved knew what that meant. Su Dingfang packed his bags and set out with the enthusiasm of a man who had waited his entire career for opportunities like this.
Unfortunately, geopolitics rarely arranges itself for anyone's convenience.
As the Tang army crossed through Qinghai, it ran headlong into the Tibetan military.
Relations between Tang and Tibet had deteriorated sharply. The marriage alliance belonged to a previous era. Songtsen Gampo was dead. Li Shimin was dead. Effective power in Tibet now rested in the hands of Prime Minister Gar Tongtsen, better known in Tang sources as Ludongzan.
Ludongzan's ambitions were no secret. He had quietly absorbed the Bailan Qiang tribes and was steadily encroaching on the remnants of Tuyuhun territory. None of these developments had been discussed with Chang'an.
In 656 CE, he mobilized one hundred and twenty thousand troops to complete the incorporation of the Bailan Qiang. Afterward, he stationed the army near Mount Jishi in modern Qinghai and began preparing for his next move.
No explanation was offered to the Tang court.
Su Dingfang, meanwhile, was conducting a rapid march under strict time constraints. His route happened to pass directly through Qinghai.
The two armies met at Wuhai, near present-day Longyang Gorge.
For a moment, both sides simply stared at each other.
The Tibetan force was commanded by Deputy Prime Minister Dayan Mangbuzhi and numbered roughly eighty thousand men.
Su Dingfang commanded thirteen thousand Tang veterans.
The unexpected obstacle irritated him. He had a destination to reach and very little interest in delays.
Su Dingfang launched a series of aggressive cavalry attacks that shattered the Tibetan formations, routed a force more than six times the size of his own, and then continued west without pause. There was still a rebellion waiting for him.
The official Tang histories reduced the engagement to a brief entry:
*"Won a battle at Wuhai against superior numbers, inflicting a severe defeat upon the Tibetans." *
The historians did not bother recording Tibetan casualties. Su Dingfang probably did not bother counting them.
Tibetan records tell a very different story.
The accidental clash triggered a political earthquake in Lhasa.
Dayan Mangbuzhi was killed in battle. Responsibility for the disaster fell upon Ludongzan, who was forced to resign under the polite explanation of advancing age. A new prime minister, Womei Dailuozan, took office.
Shortly afterward, he was assassinated.
Ludongzan returned to power.
The Tibetan court came dangerously close to tearing itself apart.
Su Dingfang remained completely unaware of all this. After spending decades waiting for meaningful commands, he was focused on exactly one thing: completing the mission before someone else found a way to claim the credit.
Driven by that concern, he ordered a punishing forced march. The army covered three hundred li in a single day and night.
The rebel leader Duman awoke the next morning, stretched, stepped outside, and discovered the entire Tang army waiting for him.
Duman was a practical man. He tied himself up, walked out the gate, and surrendered unconditionally.
It was, by far, the least stressful conquest of Su Dingfang's military career. ]