cede

1. V-T If someone in a position of authority cedes land or power to someone else, they let them have the land or power, often as a result of military or political pressure. (迫於軍事、政治壓力) 割讓; 讓出 (領土、主權)[正式]

Only a short campaign took place in Puerto Rico, but after the war Spain ceded the island to America. 波多黎各島僅經歷了一場短暫的戰鬭，但大戰後西班牙把該島割讓給了美國。