Earl Sweyn, in the meanwhile, had strained all his powers to meet the emergency. With the aid of Erling Skjalgsson of Sole and Einar Thambarskelver he had got together a fleet of forty-five well-equipped ships, manned with about 3,000 warriors. With this formidable force he met Olaf at Nessje, a head-land on the coast of Vestfold. It was Palm Sunday (March 25, 1016), and, according to the story, Olaf sent a messenger to the earl requesting him to grant a truce until the next day. The earl, however, who had no scruples on account of the holiday, refused the request, and the battle commenced. As was the custom in naval battles, the ships were tied together with ropes, "The Churl's-Head" occupying the centre and the smaller crafts the extreme wings. On board the king's ship were 120 picked men, all clad in ring armor and with French helmets on their heads. Their shields were white, with crosses of red or blue or gilt; crosses of the same colors also adorned their helmets. The king instructed his men to appear at first to act on the defensive, saving their spears until the enemy had thrown away theirs. This stratagem proved effective; for, as the king's battle-array bore down upon that of the earl, he was received with a storm of missiles. His men, however, were only at pains to protect themselves, thereby redoubling the martial zeal of their opponents, who imagined they were afraid. Then, when spears and arrows grew scarce on the earl's side, a vehement onslaught from the king met with no adequate resistance. Olaf took advantage of the momentary surprise to steer up to the earl's ship and engage him at close quarters. The fight there was long and bitter, and men fell in heaps on both sides. At last Earl Sweyn's men began to waver, and one by one the ships were cut loose and prepared to flee. But Olaf's men held them fast with boat-hooks until Sweyn ordered the prows to be cut off; even thus he would not have escaped with his life, if his brother-in-law, Einar Thambarskelver, had not flung an anchor aboard to him, and by means of the rope attached to it hauled him out of the line of battle. For all that, he managed to collect his ships further out in the fjord, and for a while it looked as if a fresh attack was imminent. Sigurd Syr urged Olaf not to let the opportunity escape of utterly destroying Erling Skjalgsson and Einar Thambarskelver. "For," said he, "I well foresee that thou with thy character and ambition, wilt scarcely ever reach the point, when thou canst trust those magnates who are accustomed to bid defiance to chieftains." Before Olaf had time to answer, the earl's fleet suddenly scattered, and the opportunity for destroying the chiefs was lost. The king's first act after the battle was to kneel upon the strand and thank God for the victory.