In the late 9th Century, under King Alfred the Great of England, scholars compiled a history of the island from the invasion by Julius Caesar to 891. The narrative, drawn from many historical accounts, was known as the Anglo Saxon Chronicle. After Alfred's death, the Chronicles were continued, with some versions being updated yearly until 1154. Today, the Anglo Saxon Chronicles are the most important source for early English history. Among the events described in the Chronicles are the Roman withdrawal from England, the first Viking raids on the island, and the Battle of Hastings that led to Norman rule.