Improve your knowledge on the Battle of Hastings with fun facts for kids. Find out more about the Norman Conquest of England and learn with DK findout!. WHY? The Battle of Hastings was fought because William of Normandy thought he should be the King of England. They started the battle at the top of the hill and the Normans started at the bottom. Have a look at our fun fact for this week. In William the Conqueror set sail from Normandy to take part in one of the fiercest battles on British soil, the Battle of Hastings.