At the Battle of Marathon, the Athenians sent a runner to Sparta to ask for reinforcements. Considering the distance is almost 150 miles, why did they not sent someone on horseback?

by [deleted]
Solistrum

This was asked before and had good answers by u/Iphikrates : https://www.reddit.com/r/AskHistorians/comments/4e055i/why_was_a_runner_used_to_get_to_marathon_instead/

Humans are more durable than horses in long distances. We are stronger than we look.