Conversation so far:
What are Prince Harry's Invictus Games?
The Invictus Games is an international multi-sport event, created by Prince Harry, Duke of Sussex, in which wounded, injured or sick armed services personnel take part in nine sports.
Was Prince Harry an injured serviceman?
No
Did Prince Harry participate in the Invictus Games?
The 2014 opening ceremony was attended by Prince Harry, British Prime Minister David Cameron, Prince Charles, Camilla, Duchess of Cornwall, Prince William, and Frederik, Crown Prince of Denmark.

Question: Did he do this work to honor his mother?
Self-contained rewrite: Did Prince Harry do this work on the Invictus Games to honor his mother?