Jan Dunin-Brzeziński, rotmistrz, dowódca Dywizjonu Kawalerii Legionów Polskich, Stanisław Janowski

The person in the photo is rtm. Jan dunin-brzeziński, commander of the cavalry division of the polish legions. Later lieutenant colonel of cavalry in the polish army of the second polish republic. The photo was taken between june and september 1915 on the front of the polish legions in bukowina. Date: between June 1915 and September 1915.