A nation over which the god of war presided and whose king was selected, mainly, for his abilities as a chieftain, naturally guarded and surrounded itself with a well devised military system. Religion and war were blended in the imperial ritual. Montezuma, himself had been a priest before he ascended the throne. This dogma of the Aztec policy, originated, perhaps, in the necessity of keeping up a constant military spirit among a people whose instincts were probably civilized, but whose geographical position exposed them, in the beginning, to the attacks of unquiet and annoying tribes. The captives were sacrificed to the bloody deity in all likelihood, because it was necessary to free the country from dangerous Indians, who could neither be imprisoned, for they were too numerous, nor allowed to return to their tribes, because they would speedily renew the attack on their Aztec liberators. Accordingly we find that the Mexican armies were properly officered, divided, supported and garrisoned, throughout the empire;--that there were military orders of merit;--that the dresses of the leaders, and even of some of the regiments, were gaudily picturesque;--that their arms were excellent;--and that the soldier who died in combat, was considered by his superstitious countrymen, as passing at once to "the region of ineffable bliss in the bright mansions of the sun." Nor were these military establishments left to the caprice of petty officers for their judicial system. They possessed a set of recorded laws which were as sure and severe as the civil or criminal code of the empire;--and, finally, when the Aztec soldier became too old to fight, or was disabled in the national wars, he was provided for in admirable hospitals which were established in all the principal cities of the realm. But all this expensive machinery of state and royalty, was not supported without ample revenues from the people. There was a currency of different values regulated by trade, which consisted of quills filled with gold dust; of pieces of tin cut in the form of a T; of balls of cotton, and bags of cacao containing a specified number of grains. The greater part of Aztec trade was, nevertheless, carried on by barter; and, thus, we find that the large taxes which were derived by Montezuma from the crown lands, agriculture, manufactures, and the labors or occupations of the people generally, were paid in "cotton dresses and mantles of feather-work; ornamented armor; vases of gold; gold dust, bands and bracelets; crystal, gilt and varnished jars and goblets; bells, arms and utensils of copper; reams of paper; grain; fruits, copal, amber, cochineal, cacao, wild animals, birds, timber, lime, mats," and a general medley in which the luxuries and necessaries of life were strangely mixed. It is not a little singular that silver, which since the conquest has become the leading staple export of Mexico, is not mentioned in the royal inventories which escaped destruction.[16]