During the Clone Wars, clone trooper lieutenants were clone troopers specially trained as officers on Kamino, and recognized by the unique blue markings on their helmets and torso armor. They would however, often wear armor that was specifically painted to match the environment.
Clone lieutenants commanded platoons comprising four squads, or thirty-six troops. Numerous lieutenants participated in the First Battle of Geonosis, where they made their debut in battle, along with many of the other ranks of clones. Clone trooper lieutentants often reported to their respective clone trooper captains.
Clone trooper lieutenants wore distinguished blue Phase I clone trooper armor during the first years of the Clone Wars; later they wore armor that distinguished them by division and not by rank. ARC trooper lieutenants sported ARC trooper armor, which optionally provided some of these units with additional weaponry, such as hidden flamethrowers. These ARC lieutenants also wore skirt-like kamas that dampened blasts, had rangefinders attached to their helmets, and wore command shoulder pauldrons. However, the markings on the ARC lieutenants' armor remained blue.
They were a rank above Sergeant and below a Captain. The rank of lieutenant among clones is also used for the ARC trooper private units. They sported additional command, along with better training and varying weapons, including wrist-mounted flamethrowers.
- Star Wars: Episode II Attack of the Clones (First appearance)
- Star Wars: Republic Commando
- The Clone Wars: The Pengalan Tradeoff
- "Heavy Metal Jedi"—Star Wars: Clone Wars Adventures Volume 1
- "Hide in Plain Sight"—Star Wars: Clone Wars Adventures Volume 2
- "Heroes on Both Sides"—Star Wars: Clone Wars Adventures Volume 5
- "One Battle"—Star Wars: Clone Wars Adventures Volume 3
- Hero of Cartao
- Jedi Trial
- Star Wars: The Clone Wars – "The Hidden Enemy"
- Star Wars: The Clone Wars film
- The Clone Wars: Prelude
- Star Wars: The Clone Wars – "Ambush"
- Star Wars: The Clone Wars – "Rookies"
- The Clone Wars: Headgames
- Star Wars: The Clone Wars – "Brain Invaders"
- Reversal of Fortune
- Star Wars: Republic: Into the Unknown
- "To the Vanishing Point"—Star Wars: Clone Wars Adventures Volume 6
- Star Wars: Episode III Revenge of the Sith
- Inside the Worlds of Star Wars: Attack of the Clones
- "Guide to the Grand Army of the Republic"—Star Wars Insider 84
- "Order 66: Destroy All Jedi"—Star Wars Insider 87
- Star Wars: Complete Locations
- The Essential Guide to Warfare