Coral Sea was, at best, tactically indecisive [some might give the tactical win to the Japs based on respective losses], but a clear strategic win for the Allies. The Japanese move against Port Morseby was stopped cold. More importantly, due to their aircrew losses and damage, SHOKAKU and ZUIKAKU missed Midway. That’s at least one-third of their veteran carrier air strength, and one-third of Kido Butai’s carrier strength. Plus SHOKAKU and ZUIKAKU were Japan’s most modern, and largest fleet carriers at the time.