Notwithstanding all the precautions which had been taken, the difficulties of the route were so great that the progress of the troops was very much impeded. The track was every where encumbered with bushes, rocks, fallen trees, and swampy tracts of ground, so that the soldiers made way very slowly. Great numbers of the torches failed in the course of the night, some getting extinguished by accident, and others going out from exhaustion of fuel. By these means great numbers of the troops were left in the dark, and after groping about for a time in devious and uncertain paths, became hopelessly lost in the forest. Notwithstanding all these difficulties and discouragements, however, the main body of the army pressed resolutely on, and, just about daybreak, the van came out upon the heights above the Roman encampment. As soon as a sufficient number were assembled, they were at once marshaled in battle array, and, descending from the mountains, they made a furious onset upon the intrenchments of the enemy. The Romans were taken wholly by surprise, and their camp became immediately a scene of the wildest confusion. The men started up every where out of their sleep and seized their arms. They were soon in a situation to make a very effectual resistance to the attack of their enemies. They first beat the assailants back from the points where they were endeavoring to gain admission, and then, encouraged by their success, they sallied forth from their intrenchments, and became assailants in their turn. The Greeks were soon overpowered, and forced to retire altogether from the ground. A great many were killed, and some elephants, which Pyrrhus had contrived by some means to bring up to the spot, were taken. The Romans were, of course, greatly elated at this victory. In fact, so much was Curius gratified and pleased with this success, and so great was the confidence with which it inspired him, that he determined to wait no longer for Lentulus, but to march out at once and give Pyrrhus battle. He accordingly brought forth his troops and drew them up on a plain near his encampment, posting them in such a way as to gain a certain advantage for himself in the nature of the ground which he had chosen, while yet, since there was nothing but the open field between himself and his enemy, the movement was a fair and regular challenge to battle. Pyrrhus accepted this challenge by bringing up his forces to the field, and the conflict began.