Complex sentence: The Battle of Agincourt was a major English victory in the Hundred Years'War, on Friday, 25 October 1415 (Saint Crispin's Day), near modern-day Azincourt, in northern France.
Split into simpler sentences: The Battle of Agincourt was a major English victory in the Hundred Years'War. The battle occurred on Friday, 25 October 1415 (Saint Crispin's Day), near modern-day Azincourt, in northern France.