Haha, that's a combat practice that I set up. We still use that for dev purposes, which is useful.
The number of armadas in that game is about 240 for the Peltians and 180 for the Andors, I think. They are in the process of ripping the Burlusts and the Acutians to shreds, heh. That's about 10 hours of gametime in, although it is a save from a much older version of a game before some of the newer armada logic was put in, so I doubt that that many would wind up sitting around unused for so long that they would collect like this anymore. Who knows, but at any rate most races are now so aggressive after 100ish armadas that it tends to keep the armada counts to about a third of what is shown there. Per race. So that many total armadas is totally doable if you are helping out a lot of races and trying to keep it balanced Skyward-Collapse-style. It's just harder to do now.