Russo-Japanese War
The Japanese got Port Arthur and the Russian railway in Manchuria. Five years later, in 1910, Japan took over Korea. Japan would continue to grow its empire in Asia until World War II. The Russian defeat was one of the reasons for the Russian Army's great improvement after 1904, which helped start the European arms race that was a cause of World War I. The war also contributed to the Russian Revolution and to the Russian Civil War in 1917. Vladimir Lenin, who helped start the revolution, wanted Russia to lose the war since that showed that the tsar was losing power.