structural:reformatting, information:highlighting, linguistic:paraphrasing, structural:scholar_edition, information:filtering
Dispositions of forces and tactics

Harold's forces deployed in a small, dense formation at the top of a steep slope, with their flanks protected by woods and marshy ground in front of them. The line may have extended far enough to be anchored on a nearby stream. The English formed a shield wall, with the front ranks holding their shields close together or even overlapping to provide protection from attack. Sources differ on the exact site that the English fought on: some sources state the site of the abbey, but some newer sources suggest it was Caldbec Hill.

More is known about the Norman deployment. Duke William appears to have arranged his forces in three groups, or "battles", which roughly corresponded to their origins. The left units were the Bretons, along with those from Anjou, Poitou and Maine. This division was led by Alan the Red, a relative of the Breton count. The centre was held by the Normans, under the direct command of the duke and with many of his relatives and kinsmen grouped around the ducal party. The final division, on the right, consisted of the Frenchmen, along with some men from Picardy, Boulogne, and Flanders. The right was commanded by William fitzOsbern and Count Eustace II of Boulogne. The front lines were made up of archers, with a line of foot soldiers armed with spears behind. There were probably a few crossbowmen and slingers in with the archers. The cavalry was held in reserve, and a small group of clergymen and servants situated at the base of Telham Hill was not expected to take part in the fighting.

William's disposition of his forces implies that he planned to open the battle with archers in the front rank weakening the enemy with arrows, followed by infantry who would engage in close combat. The infantry would create openings in the English lines that could be exploited by a cavalry charge to break through the English forces and pursue the fleeing soldiers.