Wow, something made by Disney that doesn't try to pretend the prequels didn't exist. Shocking, I didn't know they could do that.
Snark aside, I wonder if the droid gunship and B2s are from a flash back sequence to the titular character's childhood. He's old enough that he'd remember the Clone Wars, and his planet (didn't look like Mandalore) could have been invaded during the war by the CIS.