At the fortress wall. Let them come in Vasily Vereshchagin (1842-1904)

The picture has something of this: people, group, many, weapon, military, war, man, skirmish, soldier, army, gun, wear, cavalry, vehicle, transportation system, mammal, group together, battle, woman.
Perhaps it’s a painting of a group of men marching in a line down a dirt road in front of a rocky outcrop with a hill in the background.