How did Japan's plan backfire?

Answer 1

Japan's plan backfired primarily due to its underestimation of the United States' military capabilities and resolve after the attack on Pearl Harbor. Instead of demoralizing the U.S. and securing dominance in the Pacific, the attack galvanized American public opinion and led to a massive mobilization of resources for war. Additionally, Japan's overextension in its military campaigns ultimately strained its supply lines and weakened its position, leading to decisive defeats in battles such as Midway. This shift in momentum ultimately contributed to Japan's downfall in World War II.