After the Japanese bombed Pearl Harbor
It is D) 1940. France fell to the Nazis during the Battle of France (1940).
<span>The Mongols were more successful at emerging from central Asia where larger groups were not due to several factors:
1- The Mongols had the advantage of having </span><span>Genghis Khan with them
2- Their number was much less than that of other pastoral groups
3- They did not depend on civilization for transportation. Instead, they rode horses in order to </span>border the Siberian forest. They depended on <span>hunting, herding and arching for protection and for getting food.</span>