Zhu Jin

Zhu Jin, posthumously named Emperor Jilong, was an emperor of the Ming Dynasty. His father, the Huangyi Emperor, died during a defense against the Jiang Dynasty, and his eldest son, Zhu Hui, assumed the throne. The Jiang Dynasty breezed through Luoyang during the Huan Emperor's reign, and the emperor himself died while escaping the capital. His second brother, Zhu Jin, took the throne and moved the imperial capital to Nanking.

Jiang Conquest
Unlike Zhu Hui, Zhu Jin didn't retreat with every defeat. He pushed on. He knew that the Jiang army was exhausted from suppressing the Former Liao in the north, and he knew that the Ming Yuan Army was still the most elite unit in the world at that time. The Ming Yuan Army was only reserved to protecting the Emperor and defending the capital, but seeing that there was nothing to lose, he ordered all his armies to line up at the border, and charge at the same time. This spooked the Jiang Emperor, Gaoyi, who was under control by Lian Huo, his Prime Minister, and he ordered a complete retreat. This weakened the Jiang military force further, as retreating soldiers were hammered by the Ming soldiers. Seeing this, Gaoyi took control and ordered them to attack back. This confused the Jiang soldiers and generals, causing a panic, then the Ming army caught up and defeated the Jiang armies. Seeing this, Gaoyi committed suicide, and later that year, Jilong would reunite China. In a year also, Jilong had reunified China. This feat was never repeated.

Aftermath
The Ming greatly declined as Jilong's son, Zhu Yunwen, failed to suppress the mongol rebellion, and the Mongol Confederation was established. This proved disastrous to the Ming, as they have lost control of the mongolian plains, and this prompted further rebellions from other ethnic races.