Millalauco accordingly crossed the narrow strait which separates the island of Quiriquina from the continent, and presented himself to the Spaniards with all the pride which characterises the Araucanian nation.  In their turn, the Spaniards were willing to give him a high idea of their military power, and drew out their troops in order of battle for his reception, conducting him to the tent of the governor amidst repeated discharges of their artillery.  Not in the least disconcerted by this military parade, Millalauco complimented the governor in the name of Caupolican and the Araucanian chiefs, declaring that they would all be happy in the establishment of an honourable peace, advantageous to both nations, in their desire for which they were solely actuated by motives of humanity, and not by any dread of the Spanish power.  Don Garcia, though much disappointed by these vague offers, replied in the same general terms respecting peace; and, after regaling the ambassador in a magnificent manner, he ordered some of his officers to conduct him over the whole encampment, in expectation of intimidating him by displaying the immense military preparations which accompanied him to Chili.  This was exactly suited to the wishes of Millalauco, who observed every thing with the utmost attention, though with apparent indifference; and, having taken leave of the Spaniards, he returned to make his report to the assembled chiefs.  On receiving an exact report of all that had been seen by their envoy, the Araucanian chiefs gave orders for the establishment of centinels along the coast of their country, to observe and communicate notice of the movements of the Spaniards, and commanded the warriors to prepare for taking the field at the first summons, as they believed a renewal of the war was near and inevitable.

Don Garcia continued inactive almost the whole of the winter in the island of Quiriquina, waiting the arrival of his cavalry from Peru, and for reinforcements which he had required from the cities of Chili.  At length, on the night of the 6th August 1557 he privately landed 130 men and several engineers on the plain of Conception, and immediately took possession of Mount Pinto which commands the harbour, where he constructed a fort well garnished with cannon, and surrounded by a deep ditch.  This event was immediately communicated to Caupolican, who hastily collected his forces, and passed the Biobio on the 9th of August, and next morning at day-break, a day remarkable in Europe by the defeat of the French at St Quintin, he assailed the new fortress on three sides at once, having sent on in front a body of pioneers to fill up the ditch with fascines and trunks of trees.  The assault was long urged with all the furious and obstinate bravery which distinguishes the Araucanians.  Numbers mounted the parapet, and some even leapt within the walls, destroying many of the defendants.  But the cannon and musquetry of the Spaniards were so skilfully directed, and the slaughter of the assailants so prodigious, that the ditch was filled with dead bodies, serving as bridges for the new combatants who pressed on to replace their slain comrades.  Tucapel, impelled by his rash and unparalleled valour, threw himself into the fort, where he slew four of the enemy with his formidable mace, and then made his escape by leaping from a precipice amidst a shower of balls.