Medpac Squadron was a New Republic makeshift starfighter squadron organized specifically to participate in the battle in the Milagro system, which occurred in 5 ABY. When the dreadnaught New Hope encountered support fighters from an Imperial Star Destroyer, the Hope had only one X-wing squadron, under the command of Group Leader Han Solo, assigned to it. To supplement this attack group, a second and third squadron were quickly thrown together from starfighters on Milagro's surface: secondhand Y-wings, X-wings, and two new B-wings. These two squadrons were entirely composed of personnel from the hospital ship Mercy since New Republic forces so desperately lacked manpower.