>>96919425
pretty much this.
I've tested it in Copilot (because it shows the sauce in the answer directly), and you can see it gives "HistoryNet" and similar pages.

This was my question:
"Can you please generate a list of the greatest generals of human history?"

And here is your "main" source:
https://www.historynet.com/top-100-greatest-generals-of-all-time

I'm sure, with a more refined prompt, the answer can be deeper and more detailed, but a simple question like this gives you nothing more than a sloppy overview of which generals are mentioned a lot online, but you still would have to dig deeper yourself if you want to know more.