aug 1, 1346 - The Battle of Crecy
This was the first major battle of The Hundred Years War. The small English forced that worked for Edward III defeated the French army of Philip VI by advance infantry tactics and archery. During this battle, the King of Bohemia was killed which was John of Luxembourg and Edward went to take on the French port of Calais.
Added to timeline:
Madison Arenas: The Hundred Years Timeline