How did imperialism take place

Imperialism did not begin in the nineteenth century. From the sixteenth to the early nineteenth century, an era dominated by what is now termed Old Imperialism, European nations sought trade routes with the Far East, explored the New World, and established settlements in North and South America as well as in Southeast Asia. They set up trading posts and gained footholds on the coasts of Africa and China, and worked closely with the local rulers to ensure the protection of European economic interests. Their influence, however, was limited. In the Age of New Imperialism that began in the 1870s, European states established vast empires mainly in Africa, but also in Asia and the Middle East.