Portuguese Empire: The Portuguese Empire was one of the longest-lived colonial powers, spanning almost six centuries from when Ceuta was captured in 1415, to when Macau (now China) was handed over in 1999.
Colonialism: Colonialism is a practice or policy of control by one people or power over other people or areas, often by establishing colonies and generally with the aim of economic dominance.
Independence Movements: Independence movements are political campaigns for independence from an imperial power. These can be peaceful or violent, like Brazil's relatively peaceful path to independence.