You might like to read these old reviews from CombatSim.com: http://www.combatsim.com/review.php?cat=12
According to one of them, "This World War I flight sim was originally released in December, 1997 as Red Baron II, but immediately began a 9 month period of revision which led to Red Baron 3D."
I didn't own a PC with Internet access until Christmas of '98. I had never played a sim of any kind, but I had always loved WWI aviation. I was fascinated to hear of RB3D! What must it be like, to pilot a WWI aircraft on a computer? There were other games, too; Flying Corps, (and another, was it Dawn Patrol?). Which one was best?
I bought RB3D. And put it on my bookshelf. I was in graduate school. RB3D, sadly, must wait. When I found myself free to try it out, in the fall of 2001, I realized I had missed the game's MMP glory days. But for single-player campaigning, the best was yet to come...