Siege of Fort Zeelandia in the context of "Kingdom of Tungning"

The island of Taiwan, also commonly known as Formosa, was partly under colonial rule by the Dutch Republic from 1624 to 1662 and from 1664 to 1668. In the context of the Age of Discovery, the Dutch East India Company established its presence on Formosa to trade with neighboring Ming China and Tokugawa Japan, and to interdict Portuguese and Spanish trade and colonial activities in East Asia.

The Dutch were not universally welcomed, and uprisings by both aborigines and recent Han arrivals were quelled by the Dutch military on more than one occasion. With the rise of the Manchu-led Qing dynasty in the early 17th century, the Dutch East India Company cut ties with Ming China and allied with the Manchu Qing instead, in exchange for the right to unfettered access to their trade and shipping routes. The colonial period was brought to an end after the 1662 siege of Fort Zeelandia by Koxinga's army who promptly dismantled the Dutch colony, expelled the Dutch and established the Ming loyalist, anti-Qing Kingdom of Tungning.

Zheng Chenggong (Chinese: 鄭成功; pinyin: Zhèng Chénggōng; Pe̍h-ōe-jī: Tēⁿ Sêng-kong; 27 August 1624 – 23 June 1662), born Zheng Sen (鄭森) and better known internationally by his honorific title Koxinga (國姓爺), was a Southern Ming general who resisted the Qing conquest of China in the 17th century and expelled the Dutch from Taiwan, founding the Kingdom of Tungning.

Born in Japan to a Chinese father and a Japanese mother, Zheng rose through the Ming court via the imperial examinations and was serving as a Guozijian scholar in Nanjing when Beijing fell to rebels in 1644. He swore allegiance to Longwu Emperor, who favored and granted him the royal surname Zhu in 1645, a name he proudly used instead of his native Zheng surname for the rest of his life, hence popularizing his aforementioned honorific name. He was made the Prince of Yanping (延平王) by the Yongli Emperor in 1655 for his stern loyalty and numerous anti-Qing campaigns. He was best known for defeating the Dutch East India Company's colonial state on Taiwan, who had been harassing and raiding his maritime supply lines, at the Siege of Fort Zeelandia in 1662 and established a dynastic state on the island that continued to exist until 1683. After defeating the Dutch, he died suddenly in 1662 while planning to invade Luzon in retaliation for the Fourth Sangley Massacre committed by Spanish colonists in the Philippines.

Tainan (/ˈtaɪˈnɑːn/), officially Tainan City, is a special municipality in southern Taiwan, facing the Taiwan Strait on its western coast. Tainan is the oldest city on the island and commonly called the "prefectural capital" for its over 260-year history as the capital of Taiwan under Dutch rule, the Kingdom of Tungning and later Qing dynasty rule until 1887. Tainan's complex history of comebacks, redefinitions and renewals inspired its popular nickname "the Phoenix City". Tainan was classified as a "Sufficiency"-level global city by the Globalization and World Cities Research Network in 2020, but no longer be classfied in 2022, 2024.

As Taiwan's oldest urban area with over 400 years of history, Tainan was initially established by the Dutch East India Company (VOC) as a ruling and trading base called Fort Zeelandia during the Dutch colonial rule on the island. After Koxinga seized the Dutch fort in 1662, Tainan remained as the capital of the Tungning Kingdom ruled by House of Koxinga until 1683 and afterwards the capital of Taiwan Prefecture under the Qing dynasty until 1887, when the new provincial capital was first moved to present-day Taichung, and then to Taipei eventually. Following the cession of Taiwan, Tainan became the second capital of the short-lived Republic of Formosa from June to October in 1895 until the Capitulation of Tainan by the invading forces of Japanese empire. Under Japanese rule, the city was the seat of Tainan Prefecture. After the surrender of Japan in World War II, the Republic of China took control of Taiwan in 1945 and reorganized the city as a provincial city in Taiwan Province; a role that would remain in place until 2010 when the city was merged with nearby Tainan County into a new special municipality.

The Sangley Massacre was a colonial ethnic cleansing in the Philippines in June 1662, when the Spanish governor of the Captaincy General of the Philippines ordered the killing of any Sangley (Chinese Filipinos) who had not submitted to the assembly area.

Anti-Chinese sentiment had been prevalent in the Spanish Philippines since the early 17th century, resulting in the First (1603), Second (1609) and the Third Sangley Rebellion (1639). In early 1662, the Southern Ming warlord Koxinga (Zheng Chenggong) defeated the Dutch colonial outpost in Taiwan at the Siege of Fort Zeelandia and established the Kingdom of Tungning with himself as the ruler. On April 24, 1662, weeks after becoming the ruler of the Kingdom of Tungning, Koxinga demanded that the Spanish authorities of Manila pay tribute, or else he would send a fleet to demand it. The message arrived on May 5. The Spanish authorities took the threat very seriously and withdrew their forces from the Moluccas and Mindanao to reinforce Manila (modern-day Intramuros) in preparation for an attack. The Chinese residents and native Filipino subjects were forced to gather food supplies and contribute labor to improving the city walls. Some argued for killing all non-Christian Chinese residents. Upon hearing rumor of that, Chinese residents began to flee even while the Spanish tried to reassure them and keep things quiet.