No, it's the mission where booby-trapped cargo containers destroy the GTT Dobbs and GTT Stern. It's a shell game because the four transports each pick a different cargo container, but two of the containers are rigged to self-destruct.
The recommendation isn't terribly helpful; I only figured out what it meant when I replayed the FS1 campaign earlier this year. Basically, some of the Shivans don't arrive until the transports are destroyed, so if you destroy the first few fighter wings and then destroy the transports, you won't have to deal with all the Shivan fighters at the same time.
What makes this even easier is the fact that someone forgot to add departure cues for the transports, so when they reach the node they just sit there and do nothing. So tell your wingmen to ignore the transports, then take out the four freighters, then mop up the fighters that are there. One the area is clear, destroy the two transports and the last few wings will arrive. Then secure the area and wait for the Harmon, Marcos, Stern, and Dobbs to do their thing.
