The Incan Empire was 2500 miles long.
It was Francisco Pizarro who brought the smallpox disease to the Incan civilization in 1532.2nd Answerer says: While the Battle of Cajamarca in 1532 resulted in the capture of the emperor of the Inca Empire by the Pizarro's conquistadors and the native allies, it was only the first step in a decades-long campaign.Please access the related link listed below for more information:
It took him ten years to conquer the Persian Empire and turn it into an empire of his own.
Ten years.
three months
Ten years
From 334 to 327 BCE.
They were in the midst of a civil war.Their leaders were fighting among themselves.They did not have strong leadership.And the Spanish arms were vastly superior to those of the Incas.
The Roman Empire, if you mean "empire" but if you mean "Emperor" it was Caesar who conquered it and became emperor not long thereafter.
In 1528, Pizarro went back to Spain and managed to procure a commission from Emperor Charles V. Pizarro was to conquer the southern territory and establish a new Spanish province there. In 1532, accompanied by his brothers, Pizarro overthrew the Inca leader Atahualpa and conquered Peru. Three years later, he founded the new capital city of Lima.
The long list for this is very long. The short list is Darius III, emperor of the Persian empire.
Europeans discovered the Incas in about 1532. Specifically, Spanish Conquistadores under Francisco Pizarro. The Inca civilization collapsed not long afterwards.