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.
The first FORCE AWAKENS era comic series continues! Who is Captain Terrex of the First Order...and how did he find Poe's squadron? Can Poe and company beat Terrex to their prize?