Wing Commander CIC

When Blair and Eisen first come aboard The Intrepid, Eisen comments that he fought with the ships former captain during The Venice Offensive forty years ago. This struck me as odd as Venice was the focus of the last few missions in the original Wing Commander. If that had been forty years ago Blair would be about sixty and Eisen would be far older. I checked the timeline on this site and it suggests that there was about nineteen years in between the two events. Any ideas about what the story is with this?

-Ryan P. Fialcowitz