European colonization of Africa began in the late 15th century and continued into the late 19th century. Key events included Portugal helping Ethiopia fight Arab invaders in 1542; Britain beginning the slave trade in Africa in 1562; Angola becoming a Portuguese colony in 1570; Holland and France becoming involved in the slave trade in the 17th century; and Britain, France, Portugal, and other European powers establishing colonies, trading posts, and influence over various African kingdoms and empires throughout this period. By the late 19th century, most of Africa was under formal European colonial control or influence.