Who co-commanded the Norman right at Hastings with Eustace II?

William fitzOsbern co-commanded the Norman right at Hastings with Eustace II, Count of Boulogne. The right-hand division consisted chiefly of Frenchmen, together with troops from Picardy, Boulogne and Flanders.

William fitzOsbern was one of William of Normandy’s closest supporters and an important military leader. Eustace was a powerful continental lord whose lands lay around Boulogne. Their command placed two prominent allies over the wing that attacked the English position from one side of the Norman line.

The Norman army was arranged in divisions rather than as one undifferentiated mass. The centre was commanded by William himself, while the right was led by fitzOsbern and Eustace. Archers formed the forward ranks, spearmen followed, and cavalry was available to exploit gaps or pursue retreating troops.

This answer is sometimes confused because other prominent Normans, including Robert Curthose and Alan the Red, also fought in the invasion. They were important figures, but the surviving account of the battle specifically names fitzOsbern and Eustace as joint commanders of the right.