Rossum, Jan van – Portret van Johan Wolphert van Brederode (1599-1655), 1640-1655 Rijksmuseum: part 4

The picture has something of this: cavalry, seated, people, mammal, weapon, military, soldier, war, man, equestrian, sword, wear, veil, two, helmet, woman, skirmish.
Perhaps it’s a painting of a man riding on the back of a white horse in a field with a dark sky in the background and clouds in the distance.