Dutch colonial forces on Taiwan launch a pacification campaign against native villages, resulting in Dutch control of the middle and south of the island.

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.

Taiwan, officially the Republic of China (ROC), is a country in East Asia. The main island of Taiwan, also known as Formosa, lies between the East and South China Seas in the northwestern Pacific Ocean, with the People's Republic of China (PRC) to the northwest, Japan to the northeast, and the Philippines to the south. It has an area of 35,808 square kilometres, with mountain ranges dominating the eastern two-thirds and plains in the western third, where its highly urbanized population is concentrated. The combined territories under ROC control consist of 168 islands in total covering 36,193 square kilometres. The largest metropolitan area is formed by Taipei, New Taipei City, and Keelung. With around 23.9 million inhabitants, Taiwan is among the most densely populated countries.

A series of military actions and diplomatic moves were undertaken in 1635 and 1636 by the Dutch East India Company (VOC) in Dutch-era Taiwan (Formosa) aimed at subduing hostile aboriginal villages in the southwestern region of the island. Prior to the campaign the Dutch had been in Formosa for eleven years, but did not control much of the island beyond their principal fortress at Tayouan, and an alliance with the town of Sinkan. The other aboriginal villages in the area conducted numerous attacks on the Dutch and their allies, with the chief belligerents being the village of Mattau, whose inhabitants in 1629 ambushed and slaughtered a group of sixty Dutch soldiers.