Carl Blechen (1798-1840) – The Neustadt-Eberswalde Rolling Mill Alte und Neue Nationalgalerie (Berlin)

The picture has something of this: smoke, vehicle, people, water, pollution, group, outdoors, transportation system, two, river, daylight, calamity, dawn, riverbank, cavalry.
Perhaps it’s a painting of a group of people in a boat on a river next to a factory with smoke pouring out of stacks of stacks.