Picnic Beside the Sea Diario de Regoyos y Valdes (1857-1913)

The picture has something of this: people, man, water, calamity, group, military, flood, weapon, war, landscape, army, wear, battle, woman, sand, soldier.
Perhaps it’s a painting of a group of people sitting at a table in front of a body of water with a canadian flag hanging from the top of it.