Veen, Otto van – De Romeinen onder Cerealis verslaan Claudius Civilis door het verraad van een Bataaf, 1600-1613 Rijksmuseum: part 1

The picture has something of this: cavalry, people, group, mammal, man, seated, woman, skirmish, wear, veil, war, herder, weapon, two, lid, recreation.
Perhaps it’s a painting of a man riding on the back of a white horse in front of a crowd of men on either side of him and holding a flag.