5672104 Grand Duke Nicholas by Unknown photographer, (20th century); (add.info.: Grand Duke Nicholas (Tall figure (centre), in 1915, during World War One. Grand Duke Nicholas Nikolaevich of Russia (1856-1929) was a Russian general in World War I (1914-1918). A grandson of Emperor Nicholas I of Russia, he was commander in chief of the Russian Imperial Army units on the main front in the first year of the war, and was later a successful commander-in-chief in the Caucasus region. He was briefly recognized as Tsar, Emperor of Russia in 1922 in areas controlled by the White Armies movement in the Russian Far East.); Universal History Archive/UIG.