Conquest of Ceuta
1415 CE.
Shown on the map at 35.896°, -5.300°.
Portuguese forces under the command of King John I conquered the North African city of Ceuta from the Marinid Sultanate on 21 August 1415. The city's defenses fell under Portuguese control after a carefully prepared attack, and the successful capture of the city marked the beginning of the Portuguese Empire. Ceuta remained under Portuguese control until it was transferred to Spain in 1668.
Text from the Wikipedia article Portuguese conquest of Ceuta, licensed CC BY-SA 4.0.