First defeat of the Japanese navy in 350 years. This is the turning point in the Pacific front; & the U.S. goes on the offensive. U.S. forces intercept Japanese messages and are prepared for the Japanese attack. After this battle the Americans change battle tactics to strictly defensive to a mix of offensive and defensive tactics. The Japanese lost 3,500 men, four carriers, a cruiser, & 332 aircrafts. The American forces lost 307 men, on carrier (Yorktown), one destroyer, and 150 aircrafts.