The actual conquistador Cortez killed Atahualpa and 30,000 Inka people, in the name of the Spanish crown and Jesus Christ; utilizing 17 horses and 111 men, steel armor, swords, black powder firearms, and, coincidentally it is said, virological aspects they possessed immunity to.

My wild sci-fi postulates that a temporal flux capacitated LPD be sent back in time with an LCM space time reconfiguration team. Somewhere in the story is a strikingly beautiful Latina.