The Japanese seized the initiative in late August in the Battle for Shanghai, and boasted that victory would be theirs within days. Even with a significant advantage in air power and artillery, the Japanese were unable to achieve a quick victory. The Chinese heavily fortified their positions and fought tenaciously. The battles in the Zhabei District turned into a stalemate and by early October not much had changed. Still, the Japanese renewed their assaults through the rubbled city with the same bloody results.