The Periplus of the Erythrean Sea, a Graeco-Roman manuscript is written. It describes an established Indian Ocean Trade route (jan 1, 1 – jan 1, 50)
Description:
https://depts.washington.edu/silkroad/texts/periplus/periplus.html
https://en.wikipedia.org/wiki/Periplus_of_the_Erythraean_Sea
https://en.wikipedia.org/wiki/Indian_Ocean_trade#Hellenistic_and_Roman_period
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