BBY/ABY is used to position items along the Star Wars Timeline. BBY refers to Before the Battle of Yavin. ABY refers to After the Battle of Yavin. The Battle of Yavin in Episode IV: A New Hope occured in 0 BBY/ABY.
Marvel's epic exploration of the Star Wars galaxy continues! Take a walk on the dark side with Sgt. Kreel and an elite group of Imperial soldiers aboard the Star Destroyer Harbinger! It's a nigh-indestructible weapon of war. It's also the target of the Rebels' new top-secret plan. Never afraid of defying the odds, Luke Skywalker, Han Solo and Leia Organa are determined to make this the Harbinger's last flight! But Kreel and his SCAR Squad specialize in taking down rebels — hard! Let battle commence!