ANCIENT PERUVIAN MONUMENT.

Under the fourth emperor the Incas were successful in a life and death struggle against a tribe with whom they had hitherto shared the valley that surrounds Cuzco. Under the two succeeding emperors they extended their dominions south to the transverse range of mountains which separates the Peruvian from the Titicacan plateau. Yahuar Huaccac, the seventh sovereign, conquered the tribes on the eastern slopes, and by the beginning of the fourteenth century the Inca domain included the southern third of the great valley of Peru—an area of fifteen thousand square miles, containing probably two millions of people. Uira Cocha, the eighth emperor, began that wonderful series of conquests which within a century and a half extended over half of South America. On the other side of the Vilcañota "nudo" lay the vast basin which takes its name from Lake Titicaca. Too high and too cold for cereals, the plateau was inhabited by tribes of shepherds, who made no prolonged resistance when attacked by the armies of the Inca. Their rapid and complete incorporation into the Inca system followed. Colonies swarmed from the over-populated provinces of old Peru into the newly acquired territories. The Titicacan copper mines furnished the material for weapons and tools, and a great commerce in exchanging the wool, potatoes, and livestock of the higher regions for the maize and cotton of the lower added to the prosperity of the whole empire. This conquest doubled the extent of the Inca domain and opened up a vast field for colonising expansion within their own territory. Once achieved, the nation turned its attention to the conquest of the North. Beyond the gorge of the Apurimac—the Inca boundary in that direction—lay the rival nation of the Chancas, a vigorous and expanding people who were at the head of a great confederation of tribes which covered the northern two-thirds of the central plateau of Peru, and probably also included the Quichua-speaking tribes of the coast.

The Chancas defeated Urco, Uira Cocha's oldest son and successor, and their army advanced toward Cuzco, subjugating the northern allies of the Incas. The victors came within sight of the capital, where meanwhile the energetic Yupanqui, Urco's younger brother, had gathered the whole force of the empire. The battle which decided the fate of Peru was fought on the heights above Cuzco; the Chancas were defeated, and fell back only to be pursued and overwhelmed by Yupanqui. He returned in triumph and was installed as emperor in place of his incompetent brother, assuming the title of Pachacutec, or "Reformer of the World." The Incas pressed their advantage relentlessly; all the tribes of the Chanca confederacy were subjugated; and Pachacutec's generals even extended their conquests north of Cerro de Pasco. The Incas had now conquered a practicable route to the Pacific, and the coast tribes about Lima soon also fell under their control. Pachacutec built a great military road from Cuzco north along the fertile plateau, through the smiling valley of Jauja, and down the short descent to the neighbourhood of Lima. Colonies were established at strategic points, and the new territory became so rapidly welded to the Inca system that, when the Spaniards arrived a hundred and fifty years later, they found the whole of central and southern Peru occupied by a homogeneous people, perfectly loyal to the Inca dynasty.

Pachacutec's successor, Tupac Yupanqui, proved even more successful than his father. The five hundred miles of rainless coast from Lima to the Ecuador border was inhabited by a mysterious race, in civilisation and origin entirely distinct from the Quichua-speaking mountain tribes to which the Incas belonged. Short rivers, rushing down from the Andes, each irrigated a portion of the desert, which only requires water to become extremely fertile. The irrigation works of this people were on a gigantic scale, one of their reservoirs having its lower end guarded by a dam eighty feet thick at the base. The valleys were cultivated to the highest degree of perfection, and filled with a swarming and industrious population housed in cities whose ruins still survive to attest the skill of their builders. Enervated by centuries of peace, the inhabitants had long confined their warlike operations to building defensive fortresses. Nevertheless, when Tupac advanced up the coast he met a desperate and prolonged resistance, until one after another the fortresses fell. The capital of the confederacy was laid in ruins and great numbers of the people were transported to distant provinces. Garrisons and Inca colonies were established and a military road was constructed along the coast. However, the country was really held only by force, and even in Spanish times Quichua had not displaced the Mochica tongue in half the northern coast valleys.

Tupac next turned his attention to enlarging the southern limits of his empire. From Titicaca his armies advanced over hundreds of miles of bleak plateaux and barren deserts and down the steep Andean slopes into the fertile valleys of central Chile. His conquests extended as far south as the river Maule,—three hundred miles beyond Santiago,—but the tribes retained their autonomy and became rather allies than subjects. On the eastern side of the Andes he obtained the allegiance of the peoples living in the mountain valleys of north-western Argentine, and he completed the incorporation of the vast and fertile plateau which extends from the Titicacan basin to the present Argentine border.

Returning to the northern frontier, he reduced the peoples who lived in the confused tangle of mountains and gorges which lies between the two Cordilleras north of Cerro de Pasco, thus extending his boundaries nearly to the present Ecuador line. The rest of northern Peru and all of southern Ecuador belonged to tribes who were loosely attached members of the confederacy headed by the Caras of Quito. They opposed only a short resistance to the arms and diplomacy of Tupac, and he made their territory the base for the great war which he proposed to undertake against the ancient kingdom of Quito. About the year 1455 he advanced with a great army, largely recruited from the tribes recently wrested from the Quito monarch, and defeated the Caras in a great battle. The whole plateau as far north as Riobamba submitted, reducing the Shiri's domain to the neighbourhood of Quito itself and a small region north of that city. However, all of Tupac's efforts to force the last barrier which interposed between him and the Cara capital failed, and he was compelled to content himself with extending his conquests on the coast as far as the Gulf of Guayaquil. In 1460 he returned to Cuzco, where three years later he was enraged to hear that the Shiri was making a desperate and partly successful effort to recover the lost provinces. Tupac's preparations for a final campaign to wipe the Quito kingdom out of existence were interrupted by his own death.

Huaina Capac succeeded to the throne and continued his father's preparations. Bad news, however, from the far southern provinces compelled him first to undertake a campaign into Chile, in which he was victorious. He then proceeded north and devoted the rest of his life to conquering and incorporating the Cara empire. He first constructed a military road from the northern Peruvian coast to the plateau in southern Ecuador; then he exterminated or reduced to obedience the tribes on the Gulf of Guayaquil, and the coast beyond, nearly as far as the equator. Returning south, he defeated the wild savages of the regions where the Amazon leaves the mountains. Having thus secured himself against an interruption of his line of communications, he advanced against Quito in overwhelming force. The Caras and their allies among the brave tribes of northern Ecuador made a desperate resistance, but were overthrown in battle after battle, and Huaina Capac entered Quito in triumph. All the tribes of the confederacy submitted except the Caranquis, a warlike people who lived north of Quito. These achieved some minor successes, but were finally overwhelmed and exterminated.

The Inca empire, now at its greatest extent, included all the inhabitable portions of Ecuador, Peru, and Bolivia, three-fourths of Chile, and a large part of the Argentine, stretching two thousand two hundred miles north and south, and from the Pacific to the eastern foot of the Andes. Except for the plateaux of Colombia practically the whole Andean region had been united under one government. The rest of South America was occupied by savage peoples, divided into small bands, who picked up a precarious existence along the streams; and the Inca empire was safe from any serious attack on its continental boundaries. But the later conquests of Tupac and Huaina Capac had incorporated peoples in civilisation and warlikeness hardly inferior to the Incas themselves. Indeed, in the light of subsequent events, it is clear that the later campaigns weakened the real military power and homogeneity of the empire. While the older parts, southern Peru and Bolivia—the heart of the Inca domain—formed a homogeneous and thoroughly loyal centre whose inhabitants all spoke the same language and where socialism and the worship of the sun according to the Inca rites prevailed, from the latitude of Lima north the country had been too recently subdued to be counted upon. The northern coast still required to be kept down by permanent garrisons; the mountain tribes of northern Peru retained a certain measure of autonomy; and the vast territories where the Shiri of Quito had held sway for so many centuries were very loosely attached. Tupac, the first conqueror, found it advisable to remain there almost continuously during the last half of his reign, and Huaina Capac, his heir, was born in Ecuador, and devoted his whole life to that region. He married the daughter and heiress of the defeated Shiri, and was regarded rather as the legitimate successor of the ancient dynasty than as an alien conqueror.

In 1525 Huaina Capac died at Quito, leaving a will by which he bequeathed the northern kingdom to Atahuallpa, a son born to him by the Shiri's daughter. Peru, with the southern provinces, fell to Huascar, his son by a princess of Inca blood. As the eldest and the legitimate heir according to the rules of succession which governed in the Inca dynasty, the latter was to be paramount, thus retaining a semblance of unity. Huascar and the Inca nobles who surrounded him at the old Peruvian capital were unwilling to acquiesce in this virtual division of the empire. The chief of the Cañaris, a tribe always hostile to Quito, sent a messenger to Cuzco offering to swear allegiance to Huascar. As soon as Atahuallpa heard of this derogation of his authority he ordered an army to march and unseat the recalcitrant prince, and despatched an ambassador to his brother with a conciliatory message, at the same time unequivocally asserting his claim to the lordship of all the ancient domain of the Shiris. Huascar insisted that southern Ecuador, a region which had been wrested from the Caras by their grandfather, and whose tribes had only been allies of Quito, should not be included. His bitter feeling against his brother was increased by reports that Atahuallpa had assumed Incarial insignia which only a legitimate emperor was entitled to use. He returned a harsh answer, demanding immediate and unconditional obedience. Seeing nothing was to be hoped for from Huascar, Atahuallpa began gathering the forces of the Quito kingdom.