Peter II and Princess Elizabeth Petrovna Riding to Hounds. 1900 Valentin Serov (1865-1911)

The picture has something of this: waste, garbage, many, cavalry, war, people, battle, group, skirmish, military, flame, pollution, mammal, calamity, smoke, soldier, snow, trash.
Perhaps it’s a painting of a man riding on the back of a white horse next to another man.