Veen, Otto van – De Bataven verslaan de Romeinen bij de Rijn, 1600-1613 Rijksmuseum: part 1

The picture has something of this: people, group, woman, man, reclining, many, recreation, water, sea, lid, mammal, skirmish, Renaissance, war, lithograph.
Perhaps it’s a painting of a man laying on the ground in front of a crowd of people with a flag in his hand and a sword in his other hand.