King Harold had a rebel brother in Flanders, who was a vassal of Harold Hardrada, King of Norway. This brother, and this Norwegian King, joining their forces against England, with Duke William’s help, won a fight in which the English were commanded by two nobles; and then besieged York. Harold, who was waiting for the Normans on the coast at Hastings, with his army, marched to Stamford Bridge upon the river Derwent to give them instant battle.