From Wookieepedia, the Star Wars wiki.

An Acclamator-class assault ship.

The Acclamator series of assault ships consisted of two main sub-classes^[1] and several modifications to these.^[2] During the time of the Galactic Empire at least one classification system classified them as medium frigates and they were also sometimes referred to as Star Destroyers^[3][4]:

• Acclamator I-class assault ship
• Acclamator II-class assault ship

Appearances

• Star Wars Episode II: Attack of the Clones (First appearance)
• Star Wars Republic Commando
• Fierce Twilight (Ambiguously canonical source)
• Star Wars The Clone Wars 9: In Service of the Republic, Part 3
• The Clone Wars: No Prisoners
• Star Wars: The Clone Wars – "The Deserter"
• Star Wars Republic 64: Bloodlines
• Order 66: A Republic Commando Novel (Mentioned only)
• Star Wars: Empire at War
• Star Wars: Battlefront II

Sources

Wookieepedia has a collection of images related to Acclamator-class assault ship.

• Star Wars Trading Card Game: Revenge of the Sith [1]
• Starships of the Galaxy (2007)
• The Complete Star Wars Encyclopedia
• Rebellion Era Campaign Guide

Notes and references