Hammerhead corvettes were a model of corvette used in the years leading up to the Galactic Civil War.
The ships were named for a design that dated back centuries.
After learning of the rebellion's losses at the battle on Garel, Imperial senator Bail Organa of Alderaan dispatched his daughter, Princess Leia Organa along with three Hammerhead corvettes — P1, P2 and P3 — to Lothal to expand the rebel fleet, under the guise of delivering relief supplies to the people of Lothal. The princess planned for the rebels to steal them to conceal Alderaan's involvement with the rebellion, but Lieutenant Yogar Lyste installed gravity locks to prevent the corvettes from taking off. With the help of former Lothal governor Ryder Azadi, who had constructed the locks while he was in prison, the rebels were able to commandeer he corvettes and add them to their growing fleet.