Despite commanding armies of tens of thousands, Inca generals were so disoriented by the unheard-of capture of their divine emperor that they offered no resistance. This complete bewilderment allowed a handful of Spaniards to dictate terms to a vastly superior force.

Focused on winning his civil war, Atahualpa fatally misjudged the Spanish. He saw the small group as a potential asset—a source of mercenaries, horses, and superior swords to be captured and repurposed. He never considered them an existential threat to his empire, which sealed his fate.

The absolute divine authority of the Sapa Inca meant that capturing a single man, Atahualpa, effectively paralyzed a 12-million-person empire. With no alternative power structure, his generals were bewildered and leaderless, allowing a tiny Spanish force to maintain control.

To provide legal cover for killing Atahualpa, Pizarro held a rudimentary trial. The emperor was charged with a mix of political and religious crimes like regicide and incest, demonstrating the Spaniards' deep-seated need to frame their actions within a legalistic framework for their king.

The Spanish used a legal document called the "Requerimiento" to legitimize conquest. Before attacking, they read a history of the world and demanded submission to the Pope and Spanish King. Refusal provided a legal pretext for slaughter, a practice some Spaniards at the time considered absurd.

In a surreal display of dominance, Francisco Pizarro held a formal dinner with Atahualpa just hours after slaughtering thousands of his followers. He then had a mattress prepared for the Inca emperor to sleep beside him, a bizarre and intimate assertion of absolute control.

The famous moment where Atahualpa supposedly threw down a prayer book, sparking the massacre, was a manufactured pretext. The Spanish, already in ambush positions, simply needed a justification. The book ending up in the dust—whether thrown or dropped—provided the trigger for their pre-planned attack.

The threat of being burned was horrifying to Atahualpa because Inca belief required the body's preservation for the afterlife. He accepted Christian baptism at the last moment only to be garroted instead, a strategic choice to ensure his body remained intact for his own religion's paradise.

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.