With the family divided between those who wanted to invade Europe and those favoring an attack on the Sung dynasty, they reached a remarkable and unprecedented decision: The Mongol army would push out in all directions; it would divide and attack the Sung dynasty and Europe simultaneously. The Mongol army would fight campaigns that would stretch it out over a distance of five thousand miles and more than one hundred degrees of latitude, a feat unmatched by any army until World War II, when the United States and the Allies fought campaigns simultaneously in Europe and in Asia.
