World War II, it is the mankind so far, experience a world war with warlike the longest time. Well-known, of World War II basically initiating a country is Germany, Japan, Italy. Understanding, the friend of history of World War II knows, during World War II, the battlefield with the largest scale, it is Sude war. At the outset, de Jun depends on powerful martial dominant position, once Russia of sweep anything away, hit Moscow all the time. Once, someone has said such word, when De Jun hits Moscow. If, the 1 million east of Shanhaiguan that illegally or forcibly occupy northeastern region on army north, from rear assault Russia. So, russia is defeated surely undoubted, be afraid history of World War II also can be adapted. Everybody knows, russia and all along of Japanese two countries do not make do. So, why at the outset Japan did not dispatch troops on north, help Germany? Afterwar, historian analysis, at the outset Japanese east of Shanhaiguan army go up without north, because,basically be, the United States undertook punish to Japan, stop to export oil to Japan. Everybody knows, oil is crucial to the war. Allegedly, japanese oil puts a quantity to be able to maintain 2 months to control only at that time. Japan wants to get oil, must want south fall and not be north on. Though, germany and Japan are the relation of ally. But, japan to can get more warlike resource, can choose to abandon only oneself ally. Subsequently, japanese sneak attack Pearl Harbor. After Pearl Harbor incident happens, the United States is right Japanese declare war.