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It just so happens that the Battle of Agincourt (1415) was fought on October 25, which was St. Crispin's Day (the feast for the sainted twin brothers, Crispin and Crispinian). In case we forgot, Henry beats us over the head with this bit of trivia over and over and over again in his famous speech to his troops. We talk about the speech at length in our "Characters: Henry V," which is where you should go if you want to know more...