Schreyer Adolf The Ambush Adolf Schreyer (1828-1899)

The picture has something of this: people, cavalry, group, wear, mammal, many, man, seated, skirmish, weapon, veil, herder, lid, livestock, soldier, transportation system.
Perhaps it’s a painting of a group of men riding on the backs of horses next to a man on a horse with a flag on a hill in the background.