Unstable Terrain Artillery Transport

These vehicles engaged the Tri-droid forces on Mygeeto in vicious combat, taking heavy losses due to the effectiveness of the droids´ belt-fed ordnance.

Trivia
Although not clearly labled as such, it is hinted at on SW.com that the Republic vehicles seen fighting alongside Ki-Adi Mundi and his clone troops in ROTS are these artillery transports.

Appearances

 * Star Wars Episode III: Revenge of the Sith