his forces on alert throughout the summer, but with the arrival of the harvest season he disbanded his army on 8 September. Tostig and Hardrada's invasion Tostig Godwinson and Harald Hardrada invaded Northumbria in September 1066 and defeated the local forces under Morcar and Edwin at the Battle of Fulford near York. King Harold received word of their invasion and marched north, defeating the invaders and killing Tostig and Hardrada on 25 September at the Battle of Stamford Bridge. The Norman fleet finally set sail two days later, landing in England at Pevensey Bay on 28 September. William then moved to Hastings, a few miles to the east, where he built a castle as a base of operations. From there, he ravaged the interior and waited for Harold's return from the north, refusing to venture far from the sea, his line of communication with Normandy. Battle of Hastings After defeating Harald Hardrada and Tostig, Harold left much of his army in the north, including Morcar and Edwin, and marched the rest south to deal with the threatened Norman invasion. He probably learned of William's landing while he was travelling south. Harold stopped in London, and was there for about a week before marching to Hastings, so it is likely that he spent about a week on his march south, averaging about per day, for the distance of approximately . Although Harold attempted to surprise the Normans, William's scouts reported the English arrival to the duke. The exact events preceding the battle are obscure, with contradictory accounts in the sources, but all agree that William led his army from his castle and advanced towards the enemy. Harold had taken a defensive position at the top of Senlac Hill (present-day Battle, East Sussex), about from William's castle at Hastings. The battle began at about 9 am on 14 October and lasted all day, but while a broad outline is known, the exact events are obscured by contradictory accounts in the sources. Although the numbers on each side were about equal, William had both cavalry and infantry, including many archers, while Harold had only foot soldiers and few, if any, archers. The English soldiers formed up as a shield wall along the ridge and were at first so effective that William's army was thrown back with heavy casualties. Some of William's Breton troops panicked and fled, and some of the English troops appear