The year 1225 arrived with a silence that felt heavier than the roar of cannons. The Treaty of the Pale Moon had been signed, and for the first time in eight centuries, the Mongol Empire recognized an independent power. The Great Khan had retreated to his capital, his pride wounded but his mind sharpened. He needed time to study the "Magic" of the Black Sun—the gunpowder, the logistics, and the steel that had broken his Immortals.
I was Renjiro Kaidoh, the Lieutenant from 2010, and I knew exactly what this peace was: a tactical reset. I used those three years to turn Kyoto into a sprawling industrial leviathan. While the Khan rebuilt his horses and bows, I built a nation.
Chapter 3: The Dragon's Coil and the Crimson Dawn
The Reconstruction of the Sun
Kyoto had become a city of iron. The four provinces I had liberated in the previous year—Tosa, Higo, Nagato, and Iyo—were now interconnected by a network of paved military roads and signal towers. I didn't just rule; I optimized. I established schools of ballistics and engineering, training the next generation of officers in the doctrines of modern warfare.
During these years of deceptive peace, the harem grew as a reflection of my expanding influence. Five more Empresses, survivors of the Mongol conquests in the far reaches of the Silk Road and the Middle Kingdom, arrived at my gates seeking sanctuary. They brought with them the cultural and administrative secrets of empires that had existed before the Mongol shadow. I took them as wives, weaving their royal bloodlines into the Black Sun, creating a court that was a mosaic of global resistance.
Inside the palace, the air was thick with the weight of the future. The procedure I had forced upon my sister, Akari, had been a dark, clinical success. The threat of a weak, noble-led rebellion through her womb was gone. In the following years, to ensure the absolute purity and strength of the Imperial line, I took it upon myself to secure the succession. Akari gave birth to a son—a child of the Black Sun who showed every sign of perfection. He was born without the frailty of the old world's inbreeding; he was a robust, sharp-eyed heir, a "Normal" child of my own blood who would one day command the world I was currently carving out.
The Breach of Iyo
In the fourth year, the Khan's patience evaporated. He had spent three years obsessed with recreating our "Dragon-Breathers," and he believed his new military was ready. In a lightning strike across the channel, a Mongol armada landed 289,000 men on the shores of Iyo. They reclaimed the province in a night of horrific violence, the Mongol banners once again flying over the southern cliffs.
The Khan thought he had won a decisive victory. He sat in the Iyo fortress for seven days, preparing to march on Kyoto. He didn't realize he had stepped into a trap I had set years prior.
On the eighth day, the horizon darkened. I didn't send a scouting party; I sent the full weight of the Kyoto Grand Army—300,000 men. The earth shook as our heavy infantry, equipped with refined rifled muskets and field artillery, surrounded the province. The battle for Iyo was a slaughterhouse of modern design. The Mongol force of 289,000, despite their numbers, were funneled into kill-zones where our cannons mowed down entire ranks before they could even draw their bows. Within forty-eight hours, Iyo was ours again. The Khan's "New Army" was decimated, leaving the beaches choked with the wreckage of their failed ambition.
The Great Unification Blitz
With the Mongol morale shattered, I didn't retreat to Kyoto. I gave the order for the **General Advance**. The Black Sun swept north and west like a tide of oil.
Four more provinces—Awa, Sanuki, Bizen, and Mimasaka—fell within months. Our tactics were relentless: we used night-ops to assassinate governors and utilized the Dragon-Breathers to breach walls that had stood for centuries. In each province, the liberation sparked massive, desperate rebellions on the Mongol-held mainland. These mainland revolts were chaotic and lacked my 2010 military structure; they were eventually crushed by the Khan, but they served their purpose by distracting his remaining forces while I unified eight of the thirteen provinces of Japan.
The Expansion: Taiwan and the peninsula
The island was no longer enough. To protect Japan, I had to control the gates of the sea. I launched a dual invasion that pushed the Black Sun's reach into the heart of the East.
The Korean peninsula (The Five Provinces): We landed at the tip of the peninsula with 100,000 men. Korea was divided into five Mongol administrative provinces. I utilized the mountainous terrain to my advantage, employing the guerrilla tactics I had mastered in my first life. One by one, the provinces of the peninsula fell, their people rising to join the Black Sun as we broke the Mongol governors.
Taiwan (The Three Provinces): Simultaneously, my southern fleet struck Taiwan. The island was divided into three Mongol sectors. We used amphibious landing craft—primitive but effective—to storm the beaches. The tropical heat was punishing, but our discipline was absolute. The three provinces of Taiwan were integrated into my empire within weeks.
By the end of the year 1207, I stood on the deck of my flagship, anchored in the waters between the mainland and my unified islands. I had eight provinces of Japan, all of South Korea, and all of Taiwan. Behind me stood my queens—Hana, Akari, and the empresses of the fallen worlds.
The Khan had spent three years rebuilding a military of the past. I had spent three years building a nation of the future. The board was set, and the thirteen provinces were nearly mine.