Very simple achievement. The achievement description pretty much speaks for itself.
I thought it might concern some whether you had to have been connected online originally when playing Midway. I played Battlestations: Midway offline using a disc-copy if that matters years and years ago. I just bought Battlestations: Pacific just a couple of months ago.
Obtain a copy of the game or buy Battlestations: Midway digitally on the Microsoft store and play it. I'd suggest earning at least one achievement in that game just to be safe. I had achieved two of them offline way back when at the time I borrowed the game. Then boot up Battlestations: Pacific and the achievement should pop by the time the menu screen shows up.