CT-4981, nicknamed "Contrail," was an experienced clone trooper pilot whose service to the Galactic Republic and its successor state, the Galactic Empire, lasted for over two decades. Born and trained as a soldier for the Republic, Contrail became a member of the Republic Navy's Shadow Squadron and flew under the call sign "Shadow Eleven" during the Battle of the Kaliida Nebula of the Clone Wars in 22 BBY. During that battle, Shadow Squadron aimed to take out the Confederate battleship Malevolence, commanded by General Grievous, before it could destroy the Kaliida Shoals Medical Center. Despite heavy losses, the squadron successfully crippled the warship, allowing the Republic fleet to destroy it. At the end of the battle, Contrail was among the surviving members of Shadow Squadron. After