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 Separatists unleash a terrifying new weapon on Republic-held systems! An enormous starship, the Starcrusher, is destroying every ship sent against it.
Yoda agrees to a risky plan to stop the Starcrusher, and assembles a Jedi strike force that includes Obi-Wan Kenobi, Mace Windu, and Ki-Adi-Mundi.
Too late, the Jedi realize that the Starcrusher mission has become a trap—one specifically designed to kill Jedi!
Inspired by the film and television programs The Clone Wars, the fun and excitement never stop with these additional Jedi adventures.
Featuring Mace Windu in action! And introducing Jedi Knight Jyl Somtay!
The Fillbach Brothers return to The Clone Wars!"