Christopher Da Gama's Expedition is the second Historical Battle in Age of Empires III: Definitive Edition. It focuses on the aftermath of Da Gama's expedition to Ethiopia, particularly the battles between his crew and the Ethiopians against the Somalians.
Following in the footsteps of his famous father, Vasco Da Gama, Christopher Da Gama, traveled east seeking riches and adventure. On the East African coast, he learned that Ethiopia had been nearly conquered by the Somali Adal Sultanate. Da Gama set out to find and rescue the Ethiopian Emperor and help him retake his empire.