European colonisation of Southeast Asia tightening Turkish control and eventual shut down of the Eastern Mediterranean gateways into Asia first prompted Portuguese, and later Spanish and Dutch sea voyagers to ship around Africa in search of new trading routes and business opportunities. Niccolò de' Conti arrived in Southeast Asia as the earliest documented European in the early 15th century. By 1498 Vasco da Gama, who had sailed round the Cape of Good Hope, established the first direct sea route from Europe to India. Central among the various plannings was to establish direct and permanent trade of the highly priced spices, that were native to Southeast
East Africa main goal on the Swahili coast was to take control of the spice trade from the Arabs. At this stage, the Portuguese presence in East Africa served the purposes of controlling trade within the Indian Ocean and securing the sea routes linking Europe to Asia. Portuguese naval vessels were very disruptive to the commerce of Portugal's enemies within the western Indian Ocean and were able to demand high tariffs on items transported through the sea due to their strategic control of ports and shipping lanes. The construction of Fort Jesus in Mombasa in 1593 was meant to solidify Portuguese hegemony