A new vehicle introduced in SS:2845, the Subjugator is Juggernaut class vehicle. The comparison scale pictures below serve to indicate just how big this beast is.
About Juggernaut class vehicles
The new Juggernaut class vehicle was developed in response to the weak bombardment forces available in the Starsiege. Trajan mentions,
Humans have employed Juggernaut class weaponry in the battlefield with the use of agrav technology (re: Colonial Hellhammer).