Portuguese conquest of the East African coast
The Portuguese conquest of the East African coast was a series of military campaigns between 1500 and 1509, during which the Portuguese subdued and vassalized several coastal cities, establishing dominance along the East African coast. == Background == On July 8, 1497 Vasco da Gama left Lisbon with a fleet of four ships and a crew of 170 men.
Source: Wikipedia — Portuguese conquest of the East African coast (CC BY-SA 4.0)