In 1272, by beginning to build ships and forming a new military force, Kublain Khan showed his determination to conquer Japan. The Mongol army set sail for Japan in 1274, with an incredibly powerful force: hundreds of ships and even greater numbers of small boats; an army composed of 15,000 Mongolian and Chinese soldiers, 8,000 Korean soldiers, led by Mongolian commanders. Meanwhile, Japan could only muster an army of samurai from different clans, totaling 10,000. Statistically, the Japanese army was vastly outnumbered and their combat was not even superior to that of the troops Mongolians. The fighting style of samurai warriors depended primarily on the one-on-one situation, when one of them would step out of his troop, announce his name and lineage, and demand direct combat with his opposing commander. On the other hand, the Mongols attacked their opponents with their entire army, as their fighting style was focused on units and not one-on-one. To further aggravate the situation for the Japanese, the weapons of the Mongol army were much more exceptional than those of their adversaries. Short bows provided twice the accuracy of short bows.