A guess, not an answer. You'll see what everyone else said.
Machine-generated description — written by an image model, not by a person.
Young man in early 20th-century military uniform, likely 1910s–1930s, standing indoors near a window. Uniform includes peaked cap with insignia, dark tunic with collar details, and a visible shoulder cord. Vintage black-and-white grain and lighting suggest candid or documentary style.