The Chinese soldiers had to rely primarily on small-caliber weapons in their defense of Shanghai, against an overwhelming Japanese onslaught of air, naval, and armored power. In the end, Shanghai fell, and China lost a significant portion of its best troops, while failing to elicit any international intervention. The resistance of Chinese forces, however, shocked the Japanese, who had been indoctrinated with notions of cultural and martial superiority, and dramatically demoralized the Imperial Japanese Army. As the battle lasted 3 months, 1 week, and 6 days, it decisively refuted the Japanese boast that Japan could conquer Shanghai in three days and China in three months.