The company was in almost constant conflict with the English; relations were particularly tense following the Amboyna Massacre in 1623. During the 18th century, Dutch East India Company possessions were increasingly focused on the East Indies. After the fourth war between the United Provinces and England (1780–1784), the company suffered increasing financial difficulties. In 1799, the company was dissolved, commencing official colonisation of the East Indies. During the era of New Imperialism the territorial claims of the Dutch East India Company (VOC) expanded into a fully fledged colony named the Dutch East Indies. Partly driven by re-newed colonial aspirations of fellow European nation states the Dutch strived to establish unchallenged control of the archipelago now known as Indonesia.