Attack Pattern Beta
From Wookieepedia, the Star Wars wiki.
Attack Pattern Beta was a tactic used by Rebel snowspeeders in battle. It was apparently used by V-Wings as well.
[edit] Behind the scenes
In Star Wars: Galactic Battlegrounds, clicking on a snowspeeder might make him announce "Attack Pattern Beta!"
In Star Wars: Empire at War, one of the things that a V-Wing pilot may say while fighting other starfighters is "Commence with attack pattern Beta!"
