Portuguese Conquest of Ceuta
Also called: Capture of Ceuta
John I of Portugal seized Ceuta, a Muslim port across the Strait of Gibraltar — often counted as the first step in Europe’s overseas expansion.

Roque Gameiro · Public domain · Source
On 21 August 1415 a Portuguese fleet led by John I and his sons, including Prince Henry, took the Marinid (Moroccan) port of Ceuta in a single day. Ceuta was an entrepôt for trans-Saharan gold, slaves and spices; there Henry is said to have heard of the gold trade of the African interior and turned his interest to the West African coast. Religious motives — continuing the war against Islam (the Reconquista) — went hand in hand with the hope of commercial gain.