Echo Station 2-4 was a scout post that was situated at the perimeter of the Rebel Alliance's Echo Base, located on the ice-world of Hoth. Under the command of Lieutenant Garlen Evoros, the base housed a w-165 planetary turbolaser that was vital to the protection of the base from orbital Imperial attack.
During the battle of Hoth, Evoros and his men were ordered to hold the post, and with it, the turbolaser, to ensure that the Alliance transports would be able to break through the Imperial blockade. The post defended the crucial turbolaser against relentless attacks by Imperial AT-AT, A5 Juggernauts, and AT-ST forces, while the turbolaser continued attacking the orbiting Imperial fleet. After they had gotten word that the last transport was away, Evoros ordered all of the turbolaser to be fired at the oncoming Imperials, so the surviving rebels could escape on light transports landed near the post. By the time the Imperials arrived, the Rebels were gone.
For their bravery, all of the Rebels defending the base were awarded (many of them posthumously) decorations by Mon Mothma, the leader of the Alliance herself. Evoros himself recieved a promotion to Captain.