God, I loved RoN! It was like a better version of Empire Earth which, to me, was already like a better version of Age of Empires.
I mostly enjoyed the era changing, my favourite being the Napoleonic era. And I remember it having a good choice of campaigns/scenarios to play.
I thought RoN would spawn a series of titles but I think they just had Rise of Legends which was interesting but definitely not the same.
I haven’t been playing it since 86, but I feel like I first found this on the internet over 20 years ago and played it every few weeks for a solid decade. It’s still really impressive to me today that it has such replayability.