Introductory Matters
In this imperial chronology, each year is listed according to the Chinese lunar calendar with traditional notations for each year (e.g., jiashen) followed by the internationally recognized Gregorian calendar year (e.g., 1644) that approximately corresponds to the given lunar year. Information on the imperial reign is listed with each calendar year. Specific events are listed after a title denoting the lunar month (e.g., 1st Month) in which they occurred.

Ages of historical figures are given as traditionally calculated by the Chinese lunar calendar. This traditional way of counting a person's age uses the word sui (year of age). The word conveys how many lunar years—even if only for a few days or months—an individual has experienced in life.

Chinese names are shown in the conventional Chinese order with the surname (family name) followed by the given name. When possible, Manchu names are rendered according to the Möllendorff system of transliteration (Romanization). If the original Manchu name is unknown, the name is shown with a hyphenated version of the transliterated Chinese name. Some Jurchen and Manchu figures are more commonly known by their Chinese names; in those cases, the Chinese name is used. Official titles and imperial institutions are rendered according to Charles O. Hucker's A Dictionary of Official Titles in Imperial China (Stanford, 1985) when possible.

The Reign of the Jianwen Emperor (approx. 1399–1402)

Jimao Year (approx. 1399)
Jianwen Reign, 1st Year 
 
1st Month:
Dong Lun, Wang Jing, and eight other ministers overseeing rites compile the Veritable Records of Taizu (regarding the Hongwu Emperor, the first emperor of the Ming dynasty). Academician Expositor-in-waiting Fang Xiaoru directs the project.
 
2nd Month:
Zhu Biao, who was the heir apparent of the Hongwu Emperor but died before ascending to the throne, is posthumously honored as the Xiaokang Emperor with the temple name Xingzong. His late concubine, Lady Chang, is honored as empress with the honorary title the Xiaokang Empress, after her husband. The Jianwen Emperor elevates his biological mother Lady Lü as the empress dowager and elects Lady Ma as the empress and his eldest son, Zhu Wenkui, as heir apparent. His younger brother Zhu Yunteng is appointed as the Prince of Wu, Zhu Yunjian as the Prince of Heng, and Zhu Yunxi as the Prince of Xu. Academician Expositor-in-waiting Fang Xiaoru advocates restoring the ancestral institutional organization. He suggests that heads of the Six Ministries (Liu bu) be elevated to that of first-rank officials, the left and right director of the chancellery be installed and made superior to the vice minister, and the Censorate and censor-in-chief be renamed. He also suggests the Twelve Investigating Circuits be substituted with left and right tribunals, with the left tribunal named Reminder (Shiyi) and the right Rectifier of Omissions (Buque); the Office of Transmission be renamed Court of Transmission (Tongzheng shi si), the Court of Judicial Review (Dali si) be renamed Office of Judicial Review; the School for the Heir Apparent (Zide yuan) be established under the Household Administration of the Heir Apparent (Zhanshi fu); the Hanlin academician recipient of edicts be restored; the academician reader-in-waiting and academician expositor-in-waiting be renamed to erudite instructor; the Institute of Litterateurs (Wenhan guan, which assists the emperor in reading or drafting documents) and the Institute of History (Wenshi guan, for compilations and revisions) be established; the title grand academician be abridged to academician and a chancellor be installed in each respective hall or palace; the Hall of Scrupulous Behavior (Jinshen dian) be renamed the Hall of Mind Rectification (Zhengxin dian) with a chancellor; and other offices and ranking be rearranged based on The Rites of Zhou (Zhou li). The Jianwen Emperor approves his proposals.
 
3rd Month:
The Jianwen Emperor reinforces guards around Beiping (present-day Beijing) and confidentially mandates Zhang Bing, the provincial administration commissioner of Beiping, and Xie Gui, the regional military commissioner, to take preemptive action against potential insurrections. Minister of Justice Bao Zhao, Vice-Minister of Revenue Xia Yuanji, and twenty-two other officials are sent as investigation commissioners. They detect the Prince of Yan’s hypocritical loyalty and imminent rebellion and secretly notify the emperor.
 
4th Month:
Zhu Bo, the Prince of Xiang, commits suicide by self-immolation. Zhu Fu, the Prince of Qi, and Zhu Gui, the Prince of Dai are deposed due to criminal behavior.
 
6th Month:
Zhu Pian, the Prince of Min, is deposed for crimes. 
 
7th Month:
The emperor orders the arrest of subofficials in the Prince of Yan's residence. The Prince of Yan conspires with guards Zhang Yu, Zhu Neng, and the Monk Daoyan and decides upon a strategy to free them. Troops are laid for ambush behind the Gate of Decorous Rites. The prince invites Zhang Bing and Xie Gui into the residence on the pretense of presenting a list of convicts. Zhang Bing, Xie Gui, and Ge Cheng are captured and killed. The prince incites a rebellion, denouncing Qi Tai and Huang Zicheng as treacherous court officials. The prince uses the Ancestral Injunctions as a pretext, quoting, “When no just officials are found and a ruler is being coerced, princes should assume command and lead a punitive campaign for the emperor.” The Prince of Yan entitles his campaign “Pacification of Calamity” (Jingnan). The campaign begins. The emperor anxiously reads the memorial reporting that the Marquis of Changxing (present-day Changxing in Zhejiang province), Geng Bingwen, has been defeated in Zhending. He summons Geng Bingwen back to court and assigns Li Jinglong as general-in-chief. He summons the Prince of Liao, Zhu Zhi, and the Prince of Ning, Zhu Quan, to court. The Prince of Ning disobeys, and his escort guard is reduced as punishment. The Prince of Liao moves southward to Jingzhou per imperial order.

This year, the Palace of Introspection (Xinggong dian) is established.
 
Gengchen Year (approx. 1400)
Jianwen Reign, 2nd Year
 
6th Month:
The emperor follows Qi Tai and Huang Zicheng’s strategy. The court's army is repeatedly defeated. Li Decheng, the aide in the Seals Office, voluntarily seeks to persuade the Prince of Yan to withdraw troops in a truce. The prince refuses unless the emperor submits to him.

8th Month:
The Gate of Heavenly Succession (Chengtian men) is destroyed. The emperor seeks counsel. Fang Xiaoru proposes the Meridian Gate (Wu men) to be renamed the Gate of Correct Deportment (Duan men), Gate of Heavenly Succession (Chengguang men) as Waterside Gate (Gao men), and the Front Gate (Qian men) as Road Gate (Lu men). The emperor consents to the changes.
 
Xinsi Year (approx. 1401)
Jianwen Reign, 3rd Year
 
6th Month:
According to Monk Daoyan’s strategy, the Prince of Yan’s troops advance southward to take the southern capital. The emperor orders the prince to withdraw his troops, but the prince refuses. The emperor sends Qi Tai and Huang Zicheng to delay the approaching army.
 
Renwu Year (approx. 1402)
Jianwen Reign, 4th Year
 
4th Month:
Lingbi falls to the Prince of Yan. The emperor summons Qi Tai and Huang Zicheng back and resolves to cede territory in conciliation but is refused.
 
6th Month:
The troops of Yan cross the Yangtze River, storming the capital at the Jinchuan Gate. The Prince of Gu, Zhu Hui, and the Duke of the State of Cao, Li Jinglong, open the gate and welcome the enemy. The capital is defeated. The imperial palace is set ablaze and the Jianwen Emperor is never seen again. Qi Tai, Huang Zicheng, and Fang Xiaoru are targeted as principal villains with eighty other officials and a host of other implicated individuals. More than twenty civil officials, including Yang Rong, Yang Pu, and Yang Shiqi, obsequiously welcome the Prince of Yan. On the seventeenth day, the Prince of Yan, Zhu Di, takes the throne. The Prince of Zhou and the Prince of Qi are restored. The new emperor mandates the Princely Establishment and Six Ministries to overturn the policies and regulations revised by the Jianwen Emperor and return to the previous system. The year designated according to the previous reign as the thirty-fifth year of the Hongwu reign. The gates and halls resume previous appellations.
 
7th Month:
Xie Jin, the academician awaiting orders, is appointed as reader-in-waiting. Junior compilers Yang Rong, Yang Pu, and Yang Shiqi are appointed senior compilers.
 
9th Month:
The new emperor rewards officials for outstanding service in the Pacification of Calamity (Jingnan) campaign. Qiu Fu is awarded with the title the Duke of the State of Qi. Zhu Neng is named as the Duke of Cheng. Dozens are granted the title of marquis. Reader-in-waiting Hu Guang, Senior Compiler Yang Rong, Junior Compiler Yang Shiqi, and Examining Editors Jin Youzi and Hu Yan are additionally requested to serve in the Hall of Literary Profundity (Wenyuan ge) assisting the emperor with state affairs at court with seven other officials, including Xie Jin and Huang Huai.
 
11th Month:
The emperor names his principal consort Lady Xu as the empress.

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Translated and edited by Li Yang, Zhuang Ying, Adam J. Ensign, et al.