Via Starwars.com:

While the Rebel Alliance may have been victorious at Yavin, a lot of experienced starfighter pilots lost their lives during the attack on the Death Star. In Legends literature, the Alliance starfighter corps suffered another heavy blow when Renegade Flight was decimated at an ambush near Derra IV, so it was up to Yavin survivors Commander Luke Skywalker and Wedge Antilles to lead the newly established Rogue Flight to new horizons. One of these adventures brought the pilots to the remote ice world of Hoth where the Alliance had established Echo Base as their new headquarters. With the help of tacticians such as Berryl Chiffonage, Luke and Wedge devised several new tactics for the T-47 snowspeeders.

Rogue Flight operated on Hoth with Green and Blue Squadron as Rogue Group. One month after Echo Base had been declared operational, an Imperial Viper Probe Droid discovered the Rebel activity. The cautious General Carlist Rieekan immediately prepared his forces for evacuation and ground assault defense. Groups seven and ten remained on the surface to fly the snowspeeders while Blue and Green Squadron piloted or escorted the GR-75 medium transports past Darth Vader’s blockade of Star Destroyers. Let’s meet the identified rebel pilots on Hoth in The Empire Strikes Back!

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