How large were medival armies typically as opposed to ASOIAF? I saw the post about the *Great* Heathen Army and the most common estimate was around 2-3k, which in Westeros at least a lesser house like the Florents could pump out. And not to mention larger lord and their pitched battles. So I take it the real life equivalents were much smaller?

I’ve written about this before, so I’d recommend searching my archive for the term “military revolution” or “army size.”

But to answer your question directly: you need to be very careful about your terminology and dating. The Great Heathen Army landed in England in 865 CE, whereas the Wars of the Roses (on which the War of Five Kings is based) took place between 1455 and 1487 CE. It’s a bad idea to compare army sizes from six hundred years apart, because a lot changed in terms of technology, political organization, economic growth, etc. in the intervening years.