Hillegaert, Pauwels van – Prins Maurits en prins Frederik Hendrik te paard, 1630-1635 Rijksmuseum: part 2

The picture has something of this: cavalry, seated, mammal, equestrian, people, man, rider, sword, two, weapon, knight, Renaissance, wear, group, skirmish.
Perhaps it’s a painting of a man riding on the back of a white horse next to a man.