Political map of East Asia and the Western Pacific 15 December 1917 (Russian Revolution): Yuan Shikai (Yuan Shikai)'s successor, Duan Qirui (Duan Qirui), failed to retake the south (Constitutional Protection War) or rein in the growing power of rival factions in the north. Opposition to Duan's desire to join World War I (World War I) caused such chaos that royalists were able to briefly seize Beijing (Manchu Restoration). Entry into the War gave him Japanese support, but only a few months later the Russian Revolution (October Revolution) broke out, bringing even more instability to the East.