For the Japanese? It is one factor. But WWII started with Germany invading Poland. Japan had re-invented itself from a feudal country without any real punch to its power into a force to be reckoned with. Unlike China, which got a later start in converting from swords, bows & arrows, and other such items - Japan embraced western technology once they saw just how effective it really was. China was playing catch-up to Japan when Hitler began WWII. Japan saw this as a way to justify their extermination of the people of China, and began an all-out war against China. Germany, for its part, pleaded with Japan not to attack America (the so-called Sleeping Giant) but Japan wanted the Hawaiian islands because they felt the islands belonged to them. Thus Pearl Harbor. The irony of it all is that Russia and China were actually thinking about joining Hitler in his bid to take over the world. However, Hitler (or the Nazis) knew that there were huge Jewish sects in Russia and the Chinese - Japan hatred made Hitler have to choose between the two. He chose Japan but regretted it later when Japan attacked Pearl Harbor because it brought America into the war. Since America had been fed a diet of rapist, murders, druggies, and insane people for years by the Europeans (and everyone else in the world) - we were feared not only because of how powerful we were as a nation, but because they had no idea exactly what we were like except that we were brutal or barbaric in battle. We were (and still are) the crazy nation of the world. Further, since the "Wild West" was still pretty young, America enlisted the aid of American Indians. My father was grouped with some commanches in WWII and they were under direct orders to teach the rest of the guys commanche war cries. The blood curdling cries would, on their own, cause the Germans to run away (or become demoralized) because according to the movies - the Indians scalped everyone and the Germans were very much afraid that they would be scalped. Further, once things got to going it was the American Indians who would talk over the walkie-talkies because they were talking in their own language and no one except the other American Indians knew what they were saying. This is because it wasn't like code breaking. The entire language would have to be learned in order to know what was being said.