Hsiri was a group of 12 BFF-1 bulk freighters that were employed by Airam clan leader Ilay. The freighters carried warheads and conscripts to the Super Star Destroyer Vengeance. When Ilay was captured by the Rebels she revealed this transaction and B-wings from Rogue and Green Squadron were sent to disable the freighters containing conscripts and destroy the ones carrying warheads. Once the freighters carrying conscripts were disabled shuttles from Rescue Group were sent to capture them and liberate the conscripts.
Despite TIE Fighters engaging the Rebels, the operation was a success.