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Pigeon Express Messenger birds have been around for a long time, and can travel much faster than a man on horse. The Romans were good at roads, and with peace comes trading, so it would be in ever...
Answer
#1: Attribution notice removed
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System
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2021-03-30T23:53:15Z (over 3 years ago)
Source: https://worldbuilding.stackexchange.com/a/31828 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/