Hello Friends.

I am writing a piece of Historical Fiction, set in 15th century Peru. The prologue of the story establishes a historic context. I would like to verify that the prologue does not contain any egregious historical inaccuracies.

Admittedly, I have been creative with time lines, and causal relationships, to serve the themes of the story. I realize this somewhat contradicts my previous goal of historical accuracy.
Below is a condensed version of the prologue. This excerpt won't make sense as a complete story.

While keeping in mind this is a fictional work, if anyone has suggestions about how to improve the realism of this impression of Late Intermediate Period Peru, it would be much appreciated. Thank you in advance.

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15th century. Peru.

Innovation had impelled the emergence of the Inca. Their pivotal breakthrough was the Anden; the redevelopment of barren land for agricultural purposes. The construction of stone retaining walls and fresh water aqueducts, enabled steep mountain slopes to be converted into arable terraces.

As the proliferation of Andenes grew in scale, so too did the complexity of the civil projects. Born of this logistical challenge sprung the Quippu; a mathematical tool. Quippu were cords of hanging thread. Each knot, colour and yarn type of a Quippu thread described a unique record. These textile indexes facilitated numeric calculations which were crucial to the engineering of Anden. In addition, Quippu were also utilised to account for grain inventories, chronicle population censuses and relay coded messages. By harnessing such novel technologies the Inca pueblo burgeoned into a rich complex society.

Though while the Inca enclave flourished in the highlands, the once magnificent abode cities of the neighboring plains lay in ruins. For a decades-long drought had cursed the land. Densely populated historic centers had been decimated by famine. The remnants of bygone civilizations haunted the hinterlands; From the Yagua; wayward shaman communities of the Amazon jungle basin, to the Paraca; ancient tribes of the coastal desert. Exasperating the calamity came a fresh threat; the arrival of seafaring marauders from the Polynesian antipodes.

Intent on extending the reach of their imperial edifice, the Inca bureaucracy devised a cunning scheme. They would exploit the dearth to their advantage. Anden would feed the starving masses and Quippu mobilize the motley throng into a vast, coordinated work force. Missions of armed Inca viceroy were dispatched to colonize the frontier. In exchange for grain resources the peasant hands were employed to pave Qhapaq Nan; an extensive network of roads.

Yet, at every turn, revolt beleaguered the Inca conquest. To quash rebellion, the Inca enforced Mitma; the resettlement of multi-ethnic outlanders to distant, loyal territories. These disparate renegades were assimilated into the Inca state as new citizens, and persuaded to speak Quechua; the united tongue. An epoch of immense cultural upheaval swept through the region. Unprecedented, modern encounters came into being ; Herds of alpaca, monumental stone temples and the sumptuous luster of gold — All visions endemic to the saga of the Inca.