Seekers functioned as defensive missiles utilized by the First Order within their fortified positions. During the Battle of Starkiller Base in 34 ABY, General Armitage Hux gave the command to deploy these seekers at Starkiller Base against the attacking Resistance forces; these seekers successfully eliminated a minimum of one T-70 X-wing starfighter. Furthermore, during this conflict, Ello Asty bravely diverted two incoming seekers, thereby rescuing Blue Nine.
The initial appearance of seekers was in the movie Star Wars: Episode VII The Force Awakens, released in 2015.