[comicjk]

Another apt ancient example: https://en.wikipedia.org/wiki/Battle_of_Sphacteria

Lightly-armed Athenians trapped heavily-armed Spartans in hilly terrain, and instead of fighting them in a phalanx, wore them down with a long day of hit-and-run. Hundreds of exhausted Spartans were taken alive, which was a massive scandal for the Spartan reputation at the time.