Non-Somali ethnic minority groups make up the remainder of Somalia's population, and are largely concentrated in the southern regions. They include Bravanese, Bantus, Bajuni, Ethiopians (especially Oromos), Yemenis, Indians, Persians, Italians and Britons. The Bantus, the largest ethnic minority group in Somalia, are the descendants of slaves who were brought in from southeastern Africa by Arab and Somali traders. In 1940, there were about 50,000 Italians living in Italian Somaliland. Most Europeans left after independence, while a small number of Westerners are still present in Somalia mainly working for international organizations operating in Somalia.