Based on prior learning could the attract on pearl harbor have been prevented why

The Japanese attack on Pearl Harbor on 7th December 1941 is a significant event in United States history. It's speculated that the United States could have prevented the attack on Pearl Harbor and the ensued war with the Japanese. After the war documents belonging to  Joseph Grew, the American ambassador to Japan, were discovered. According to the papers ambassador Grew had obtained intelligence from the Peruvian ambassador to Japan which confirmed their was a plot to attack the Pearl Harbor. The message was received almost a year before the attack. Grew passed the info along which seemed superficial which he seemingly believed it to be unlikely. He later blamed the attack and the United States involvement in World War II on President Roosevelt.

crop rotation kepy different plants in the soil instead of once constintly. when switching out plants you have different nutrients being absorbed at different speeds and different roots growing differently therfore the spoil and water flow have to adapt and carry fresh nutrients to carry the constant changes that were going on in the soil.

cultural achievements of the 1920's 2010  

1. cultural achievements and african american achievements in the 1920’s  

2. art and literature charles lindberg flew from ny to paris, france. became national hero; first transatlantic flight.  

3. greenwich village (new york) and the south side (chicago)  many artists, writers, and intellectuals flocked to these areas to share ideas  people lead bohemian, or artistic and unconventional, lifestyles