I have always been curious as to what warfare may have looked like in earlier days. I tried googling around as well as searching through this subreddit, and most resources seem to be very low quality.

I know Gustavus Adolphus's tactics are considered innovative for the era, but the only visual aid I've seen is a gif of squares. I can't imagine what the Prussian goosestep looked like.

Are there any good resources of pictures/videos/images of medieval and early modern warfare (say, from 100-Years'-War to the Napoleonic Wars)? I mean both individual combat as well as tactics and strategy.