The Incas were weaked by the Civil War before the Spanish came.
Alexander the Great took over the Empire.
The Spanish conquistadors formed alliances with enemies of the Aztecs. Also, European diseases such as smallpox severely weakened the Aztecs. Once the Spaniards captured Montezuma, their leader, the Aztec empire soon fell.
The Inca Empire was already weakened because of their civil war.
The gold and silver Spain took from the Americas contributed to high inflation, Spainards then bought cheaper goods from other countries, and the weakened navy could be beaten.
The Incas were weaked by the Civil War before the Spanish came.
Some problems that weakened the Inca Empire were internal civil wars over succession, a smallpox epidemic that devastated the population, and a lack of immunity to European diseases brought by the Spanish. Additionally, the empire's vast size made it difficult to govern effectively and respond quickly to external threats.
Songahi
The Inca Empire was weakened by European exploration and colonization through introduced diseases, warfare, and the conquest led by Spanish conquistadors like Francisco Pizarro. These factors resulted in the downfall of the Inca Empire and the eventual colonization of the region by the Spanish.
Alexander the Great took over the Empire.
the umayyads
The decline of the Inca Empire was primarily due to the arrival of Spanish conquistadors led by Francisco Pizarro in the 16th century. The Inca were vulnerable to Spanish diseases, conquered through military tactics, and weakened by internal divisions that the Spanish exploited. This ultimately led to the fall of the Inca Empire.
Civil war among Inca rulers weakened the empire and made it susceptible to outside conquest. Additionally, the arrival of diseases introduced by the Spanish, such as smallpox, decimated the Inca population, further destabilizing the empire and making it easier for the Spanish to conquer.
Diseases from Europe that the Spanish were immune to affected and weakened the natives.
The Tang Empire was weakened by a peasant revolt led by Huang Chao weakened the empire. The emperors were incompetent after Emperor Xuanzong. The Emperor Ai was forced to abdicate in 907 AD.
the umayyads
Ottoman conquests substantially weakened the Byzantine Empire.