South China Sea raid have been the most important result of the raid, as these losses contributed to closing a supply route which was vital to the Japanese war effort. Subsequent attacks by Allied aircraft and warships forced the Japanese to cease sending ships into the South China Sea after March 1945. During 1941 and the first months of 1942, Japan conquered or established de facto rule over almost the entire South China Sea region. Control of the sea was vital to the Japanese economy, as it was the conduit through which essential supplies of oil and other natural resources passed from occupied Malaya,
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