The Pizarro brothers' extreme degradation of Manco—urinating on him while chained—was intended to break him. Instead, it became an unforgivable act of psychological warfare that backfired, destroying any chance of a puppet regime and fueling an all-out war of resistance.

In a ruthless political move, Atahualpa directed the gold-hungry Spanish to loot two of the empire's most sacred temples. Both were located in regions loyal to his civil war rival, Huascar, effectively using the invaders as a tool to punish his internal enemies.

The Spanish didn't defeat the Inca Empire at its height. They arrived after a smallpox epidemic killed the emperor and a subsequent brutal civil war between his sons shattered the empire. This left the civilization politically fractured and militarily exhausted, making it ripe for conquest by a small force.

Francisco Pizarro's initial success was built on a partnership with Diego de Almagro. By negotiating a vastly superior royal deal for himself, he sowed the seeds of a bitter rivalry. This internal feud between the co-founders would fester and ultimately prove fatal to their entire enterprise and their lives.

The conflict was defined by three fracture lines: Spanish-Inca, intra-Inca, and intra-Spanish. The vicious rivalry between the Pizarro and Almagro factions created a power vacuum and chaos that both fueled and complicated the Inca uprising, making it the most dangerous factor.

Despite being hardened by years of brutal warfare, figures like Diego de Almagro and Manco Inca repeatedly made fatal errors by naively trusting their Spanish rivals. Almagro released hostages on a flimsy promise, and Manco sheltered his own assassins, showcasing a recurring, fatal gullibility.

The Pizarro brothers, Juan and Gonzalo, relentlessly humiliated Emperor Manco by abducting and abusing his wife and sister. This personal cruelty, driven by lust and arrogance, directly sabotaged their fragile alliance and incited the devastating siege of Cusco.

The Spanish conquest of the Incas succeeded largely because they inserted themselves into an existing civil war. By siding with the southern Inca faction against the northern one, they gained crucial local allies, transforming the conflict from a foreign invasion into a complex, multi-sided war they could manipulate.

The arrival of a new Spanish faction under Diego Almagro created a power struggle. Almagro's men, who had no relationship with Atahualpa and wanted to seize Cusco's gold for themselves, successfully pressured a reluctant Pizarro to kill the emperor to advance their own agenda.