Dutch pacification campaign on Formosa

A series of military actions and diplomatic moves were undertaken in 1635 and 1636 by the United 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 (present-day Anping, Tainan), and an alliance with the town of Sinkan.

Source: Wikipedia — Dutch pacification campaign on Formosa (CC BY-SA 4.0)