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 Youtini Expanded Universe Ranking system is a 1-5 scale that ranks EU book quality, difficulty, and importance. Books closer to Level 1 are easier to read and understand, more important, and of higher quality.
Star Wars: The Clone Wars: Ackbar's Underwater Army is a Level 3 DK Readers children's book written by Simon Beecroft that was published on April 30, 2012, by Dorling Kindersley. It recounts the tale of Captain Ackbar leading his troops in the Battle of Mon Cala as seen in the episode Water War, Gungan Attack, and Prisoners.