The Lost Seas
An argosy is a gigantic wheeled vehicle used by merchants to transport valuable goods through particularly dangerous areas and by militaries as a mobile fortress. Argosies generally require a pair of mekillots (managed by psionic handlers) to drag their enormous weights and are crewed by dozens of armed soldiers, archers, and even magic-users. Due to their slowness and lack of maneuverability, argosies need to be supported by ground troops and cavalry. The expense of operating an argosy is enormous, and as such they are generally only used to protect the most valuable of cargo.