Conversation so far:
what is a common local holiday in the philippines
The Day of Valor on April 9th is a common holiday in the Philippines.
What does Day of Valor commemorate
Day of Valor or Bataan Day is a national observance in the Philippines which commemorates the fall of Bataan during World War II.

Question: Who fought in the battle
Self-contained rewrite: Who fought in the Battle of Bataan