Back in Red Baron 3D, we would have epic months-long wars. It was amazing, all online. We would plan out our missions, had a limited number of aircraft. It required 3 or 4 hours a night dedication several nights a week to play. I think this was in 1998. Had to keep track of who killed who, who got shot down, etc. But it was a blast. I only participated in one "Great War", too worn out to fly it again. It also used a rolling plane set, so at different times the Central powers would have the aircraft advantage, or the Allieds would.
I was part of a German squadron, Jasta 5 if I remember correctly.