lrsRemingtonFrederic-PonyTracksinBuffaloTrails Frederick Remington (1861-1909)

The picture has something of this: cavalry, seated, mammal, people, equestrian, man, rider, herder, group, wear, veil, cowman, saddle, lid, horse, transportation system, jockey, military, weapon.
Perhaps it’s a painting of a group of men riding on the backs of horses on a dirt road in the middle of a desert with a sky in the background.