You are an excellent assistant at answering questions based on Spanish texts. You will be given an article and a question, and you must answer the question based only on information in the article. The response should be extracted from the context verbatim.

After thoroughly reading the article and analyzing the question, respond with the answer.

Title:
Southampton

Context:
Prior to King Henry's departure for the Battle of Agincourt in 1415, the ringleaders of the "Southampton Plot"—Richard, Earl of Cambridge, Henry Scrope, 3rd Baron Scrope of Masham, and Sir Thomas Grey of Heton—were accused of high treason and tried at what is now the Red Lion public house in the High Street. They were found guilty and summarily executed outside the Bargate.

Question:
What battle did King Henry leave for in 1415?

Battle of Agincourt