OK, I'm "thumbing" through that official site (and listening to Sion's voice saying "Good, Good!" ) And it strikes me this is not a completely accurate site. It's very pretty and nice to play with... but it claims the Sith attacked Iridonia during the Mandalorian Wars, which kinda goes against the timeline and what Bao says in game.
It says "When the Mandalorian Wars began, Sith forces struck the Outer Rim Iridonian colonies with a vengeance."
That's under Bao's character description.