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
Postage stamps and postal history of Germany for the various colonial territories which had a uniform appearance depicting the imperial yacht "SMY Hohenzollern". After Germany lost control of its colonies in the course of World War I, overprinted yacht stamps were temporarily used by the new colonial rulers. Imperial Germany maintained post offices in certain towns in Morocco, Turkey, and China. Issued stamps can be recognized by the cancellation stamp or the overprint may show local denomination and the name of the country. During World War I, German authorities issued stamps in occupied countries, namely Belgium, Poland, Romania, and areas of the western and eastern front. The