After making suitable regulations for the security of this new colony, Valdivia returned to his favourite city of Conception, where he instituted three principal military officers for commanding the royal army of Chili, consisting of a quartermaster-general, a serjeant-major, and a commissary. In the present times only two of these subsist, the quarter-master-general and the serjeant-major; which latter office is now divided into two, one for the cavalry, and the other for the infantry; while the office of commissary is only now known in the militia. At this time he sent Alderte into Spain, with a large sum of money, and a particular relation of his transactions and conquests; and commissioned him to employ his utmost exertions to obtain for him the perpetual government of the country which he had conquered, together with the title of Marquis of Aranco. He dispatched likewise Francisco de Ulloa by sea, with directions to explore the Straits of Magellan, by means of which he hoped to open a direct communication with Spain, without being obliged to depend upon Peru for supplies. While occupied in the contemplation of these extensive plans for the amelioration of the extensive kingdom which he had subdued, and the advancement of his own rank and fortune, Valdivia had no suspicion of an extensive and determined system of warfare which was planning among the Araucanians, and which soon burst forth with irresistible violence, to the ultimate destruction of all the Spanish conquests beyond the Biobio, and to which Valdivia himself fell an early victim. _Colocolo_, an aged _Ulmen_ of the province of Arauco, animated by love for his country, quitted the retirement in which he had long indulged, and traversed the provinces of the Araucanian confederacy, exciting with indefatigable zeal the dormant spirit of his countrymen, which had sunk after their late disasters, and eagerly solicited them to make choice of a new supreme _toqui_ capable of directing their arms for the recovery of those parts of their country which had been subjugated by the Spaniards, through the timid conduct of Lincoyan. Colocolo was well versed in the principles of government which subsisted among the Araucanians, and had long enjoyed the reputation of wisdom throughout the whole country, in which he was so universally esteemed and respected, that his councils and opinion were always solicited and listened to on every subject of importance. Roused from their torpidity by his animating exhortations, the whole body of Araucanian ulmens assembled according to their custom in a _Butacayog_, or national council, in an open plain; and, after the usual feast, they proceeded to consult upon the situation of their national affairs, and the election of a new toqui to wipe off the disgraces which they had suffered under the direction of Lincoyan.