St Patricks Purgatory Sir John Lavery (1856-1941)

The picture has something of this: people, group, many, military, war, cropland, man, vehicle, skirmish, outdoors, landscape, weapon, soldier, cavalry, recreation, army, water, river, mammal.
Perhaps it’s a painting of a group of people walking on a path next to a body of water with a boat in the distance and a small island.