This Technology is researched in-game at the Academy, and is unlocked for free along with the Philosophy technology.
History[]
A murder hole is a opening in a fortification through which the defenders could fire, throw or pour harmful substances, such as rocks, arrows, scalding water, hot sand, quicklime, tar, or boiling oil, down on attackers. These openings covered a dead zone in a fortification as the defenders could not shoot straight down their walls, leaving the attackers relatively unharmed to try to dismantle the opposing fortifications.
