Proton mortars, employed in the Clone Wars, served as a ground-based artillery system for long-distance engagements. These weapons launched mortar shells along a curved path, detonating upon impact with the ground, making them effective against clustered enemy units or for targeting positions behind protective structures. Their main purpose was to bombard enemy defenses from a safe distance prior to launching a direct assault.
The AT-XT walkers utilized by the Grand Army of the Republic were outfitted with proton mortar launching systems.