

Bastion Onager
Load. Aim. Fire. Say your prayers.One of the simplest forms of one-armed catapult, the onager relied on twisted skeins of animal sinew which provided the power to hurl either rocks or shot. Inaccurate but powerful, it was an effective siege machine against buildings and fortifications, but was of far less use on the battlefield unless firing into massed infantry ranks. First mentioned by Philon of Byzantium in his treatise on ‘Mechanics’, the onager made use of a sling-like cradle attached to a firing arm. This arm was inserted, twisted, and propelled rocks or shot through torsion. As the firing arm was released, the sling-like cradle would unhook, firing the projectile. A padded beam was incorporated into the housing frame to restrain the arm. Larger machines could require as many as eight or ten crewmen, and the incredible recoil meant that they could not be easily or safely mounted on walls or towers. Quickly constructed wherever wood was readily available, onagers soon became a staple of siege warfare.
![]() |
Unit Name Bastion Onager |
Main Unit Key cha_gen_onager_bastion |
Land Unit Key cha_gen_onager_bastion |
Naval Unit Key cha_transport |
Soldiers 4 |
Category Siege Engine |
Class Field Artillery |
Custom Battle Cost 160 |
Recruitment Cost 160 |
Upkeep Cost 0 |
Missile Damage 200 |
├ Engine att_onager |
├ Missile Weapon att_onager |
├ Projectile att_rock_normal |
├ Missile Damage 100 |
├ Missile Ap Damage 100 |
└ Base Reload Time 34 |
Accuracy 0 |
Range 350 |
Reload 20 |
Rate of Fire 2 |
Ammunition 9 |
Melee Attack 7 |
Melee Damage 9 |
├ Melee Weapon cha_dagger |
├ Melee Base Damage 7 |
├ Armour-piercing Damage 2 |
├ Armour Piercing No |
├ Attack Against Cavalry 0 |
├ Attack Against Elephants 0 |
└ Attack Against Infantry 0 |
Charge Bonus 2 |
Melee Defence 2 |
├ Base Defence 2 |
├ Shield cha_none |
└ Shield Defence 0 |
Armour 6 |
├ Armour cha_cloth |
├ Armour Defence 6 |
└ Shield Armour 0 |
Health 100 |
├ Man Entity cha_infantry_very_light |
├ Man Health 100 |
└ Bonus Hit Points 0 |
Morale 26 |
Abilities
No Ability
Attributes
- Cannot Run
This unit cannot run and will only move at walking pace.
Strengths & Weaknesses
No Strengths and Weaknesses
Faction Availability | |
---|---|
Age of Charlemagne |