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.
Wedge Antilles is the premier X-wing pilot of the Rebel Alliance, and his Rogue Squadron is the most feared in the Rebel fleet. But the Empire has its top guns too -- the merciless Imperial 181st Fighter Division led by Baron Fel, the man who trained many of Rogue Squadron's best pilots. Wedge and the Rogues will get every opportunity to test that training when the 181 are dispatched to square accounts with Rogue Squadron, once and for all!