Japan during World War I Japan during World War I Japan participated in World War I from 1914 to 1918 in an alliance with Entente Powers and played an important role in securing the sea lanes in the West Pacific and Indian Oceans against the Imperial German Navy as the member of the Allies. Politically, the Japanese Empire seized the opportunity to expand its sphere of influence in China, and to gain recognition as a great power in postwar geopolitics. Japan's military, taking advantage of the great distances and Imperial Germany's preoccupation with the war in Europe, seized German possessions in the Pacific and East
Aftermath of World War I the exception of Czechoslovakia, they reverted to some form of authoritarian rule. Many quarreled amongst themselves but were too weak to compete effectively. Later, when Germany rearmed, the nation states of south-central Europe were unable to resist its attacks, and fell under German domination to a much greater extent than had ever existed in Austria-Hungary. At the end of the war, the Allies occupied Constantinople (İstanbul) and the Ottoman government collapsed. The Treaty of Sèvres, a plan designed by the Allies to dismember the remaining Ottoman territories, was signed on 10 August 1920, although it was never ratified by the