Prince Rupert at the Battle of Naseby I George Cattermole (1800-1868)

The picture has something of this: people, cavalry, group, mammal, lithograph, many, herder, man, skirmish, seated, camel, transportation system, war, livestock.
Perhaps it’s a painting of a group of men riding on the backs of horses down a dirt road with a flag on top of a hill in the background.