| A | B |
|---|
| castra | camp |
| hiberna | winter quarters |
| fossa | ditch; trench around camp |
| agger | earth mound, built up from dirt dug out of a ditch |
| vallum | wall or rampart of earth set with palisades (stakes) |
| praetorium | lieutenant's tent; headquarters |
| obsidio | siege |
| aries | battering ram, log with metal head to break a wall |
| testudo | protective screen of shields; tortoise |
| turris | tower |
| onager | device which hurls stones; mule |
| catapulta | device which hurls large arrows and javelins |
| ballista | larger catapult which hurls heavy stones or large arrows |
| navis longa | battleship |
| navis oneraria | cargo ship |
