John Sobieski, Vanquisher of the Turks, at the Gates of Vienna Jan Matejko (1838-1893)

The picture has something of this: people, group, many, war, skirmish, weapon, man, military, veil, battle, wear, soldier, cavalry, crowd.
Perhaps it’s a painting of a large group of people on horses in front of a crowd of men and women, with a rainbow in the sky in the background.