C. Julius Caesar, Gallic War

Basilus does as he was commanded; having performed his march rapidly, and even surpassed the expectations of all, he surprises in the fields many not expecting him; through their information he advances toward Ambiorix himself, to the place in which he was said to be with a few horse. Fortune accomplishes much, not only in other matters, but also in the art of war. For as it happened by a remarkable chance, that he fell upon [Ambiorix] himself unguarded and unprepared, and that his arrival was seen by the people before the report or information of his arrival was carried thither; so it was an incident of extraordinary fortune that, although every implement of war which he was accustomed to have about him was seized, and his chariots and horses surprised, yet he himself escaped death. But it was effected owing to this circumstance, that his house being surrounded by a wood (as are generally the dwellings of the Gauls, who, for the purpose of avoiding heat, mostly seek the neighborhood of woods and rivers), his attendants and friends in a narrow spot sustained for a short time the attack of our horse. While they were fighting, one of his followers mounted him on a horse; the woods sheltered him as he fled. Thus fortune tended much both toward his encountering and his escaping danger.