Prince Eugene de Beauharnais (1781-1824) at Ostrovno, 25 July Albrecht Adam (1786-1862)

The picture has something of this: cavalry, people, group, many, mammal, seated, herder, man, landscape, outdoors, crowd, livestock, cattle, camel, transportation system, daylight.
Perhaps it’s a painting of a military scene with men on horses and men on horseback in the foreground and on the far side of the picture is a large body of water with mountains in the distance.