/tə dɪˈklɛr əˈliːdʒəns/ – Phrase
Definition: tuyên bố trung thành.
A more thorough explanation: To declare allegiance means to publicly affirm loyalty or commitment to a particular country, government, ruler, or cause. It is a formal statement or act indicating one’s support and devotion to a specific entity or authority.
Example: The new citizens had to recite an oath to declare allegiance to their new country.