NIK4429588 First World War (1914-1918): Hairy soldiers in winter dress in a trench in 1916-1917. They wear sheepskin jackets and a gas mask. by .; (add.info.: First World War (1914-1918): Hairy soldiers in winter dress in a trench in 1916-1917. They wear sheepskin jackets and a gas mask.); Photo ?? Paulka; .