St George and the Dragon Vittore Carpaccio (c.1465-1526)

The picture has something of this: cavalry, skirmish, people, war, mammal, military, ancient, lithograph, weapon, two, armor, battle, dinosaur, soldier, engraving.
Perhaps it’s a painting of a man riding on the back of a horse next to a man on a horse with a sword and other people in the background.