Multiple national anthems may be sung at an event for several reasons:

• Honoring Multiple Nations: When an event involves participants or representatives from multiple countries, each nation's anthem may be played as a sign of respect. This is common at international sporting events, diplomatic gatherings, and other multinational occasions.
• Ceremonial or Symbolic Reasons: Sometimes, more than one anthem is sung to reflect historical or cultural ties between nations. For example, a former colony might sing the anthem of its colonizer in addition to its own at certain events to symbolize continued friendship and respect.
• Specific Event Protocols: Certain events may have specific protocols that dictate the singing of multiple anthems. This is particularly true in military ceremonies or events involving international organizations.
• Political or Diplomatic Signals: In rare cases, the singing of multiple anthems may serve a political or diplomatic purpose, such as to signify solidarity or to smooth over strained relationships between countries.