Boil was a clone trooper who fought in the Grand Army during the Clone Wars.
During the Separatist occupation of the planet Ryloth, Boil joined Obi-Wan Kenobi and Commander Cody in the battle to free the imprisoned Twi'leks. Members of the 212th Attack Battalion, Boil fought alongside his squadmate Waxer as both searched the outskirts of Nabal for enemy units.
Along the search Waxer found a lost Twi'lek girl named Numa that Boil wanted no part of looking after because he was a soldier he said. But reluctantly he helped Numa find her family and she taught him the value of humanity in war.
Danger was never far away for clone troopers assigned to scout missions: they always find themselves out ahead of the main army and under Separatist fire. On Geonosis, Boil and Waxer were sent to find Obi-Wan Kenobi's downed gunship. Getting to the crash site was difficult because of the enemy fire but the duo managed to retrieve Kenobi.