Here are some traits of it, much abridged from Snorro (who gives a highly punctual account), which vividly represent Olaf's posture and manner of proceeding in such intricacies.
The chief Ironbeard on this occasion was one Gudbrand, a very rugged peasant; who, says Snorro, was like a king in that district.

Some days before, King Olaf, intending a religious Thing in those deeply heathen parts, with alternative of Christianity or conflagration, is reported, on looking down into the valley and the beautiful village of Loar standing there, to have said wistfully, "What a pity it is that so beautiful a village should be burnt!" Olaf sent out his message-token all the same however, and met Gudbrand and an immense assemblage, whose humor towards him was uncompliant to a high degree indeed.

Judge by this preliminary speech of Gudbrand to his Thing-people, while Olaf was not yet arrived, but only advancing, hardly got to Breeden on the other side of the hill: "A man has come to Loar who is called Olaf," said Gudbrand, "and will force upon us another faith than we had before, and will break in pieces all our Gods.

He says he has a much greater and more powerful God; and it is wonderful that the earth does not burst asunder under him, or that our God lets him go about unpunished when he dares to talk such things.

I know this for certain, that if we carry Thor, who has always stood by us, out of our Temple that is standing upon this farm, Olaf's God will melt away, and he and his men be made nothing as soon as Thor looks upon them." Whereupon the Bonders all shouted as one man, "Yea!" Which tremendous message they even forwarded to Olaf, by Gudbrand's younger son at the head of 700 armed men; but did not terrify Olaf with it, who, on the contrary, drew up his troops, rode himself at the head of them, and began a speech to the Bonders, in which he invited them to adopt Christianity, as the one true faith for mortals.
Far from consenting to this, the Bonders raised a general shout, smiting at the same time their shields with their weapons; but Olaf's men advancing on them swiftly, and flinging spears, they turned and ran, leaving Gudbrand's son behind, a prisoner, to whom Olaf gave his life: "Go home now to thy father, and tell him I mean to be with him soon." The son goes accordingly, and advises his father not to face Olaf; but Gudbrand angrily replies: "Ha, coward! I see thou, too, art taken by the folly that man is going about with;" and is resolved to fight.