It is said that by the beginning of the 16th century, the Aztec and Inca states had reached their “natural” boundaries.

It is said that by the beginning of the 16th century, the Aztec and Inca states had reached their “natural” boundaries. Is this true? How were their “natural” boundaries determined?

The “natural” radius of a military monarchy is determined by the speed and ease of movement of troops within it. The expansion of the Aztec and Inca powers was hampered mainly by the difficulties of transporting supplies in the army campaigns, since all cargo was carried by people, since there were no pack animals.

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