Q. Which of these was the first battle of Russia in World War I?
Answer: Battle of Tannenberg
Notes: Russia’s first major battle in the Great War was a disaster. In the 1914 Battle of Tannenberg, over 120,000 Russian troops were killed, wounded, or captured, while Germany suffered only 20,000 casualties. Whatever nationalistic or patriotic support the Russian government had gained in the early stages of the war had been lost.