Japanese war crimes
The U.S. officially classified all 3,649 military and civilian casualties and destruction of military property at Pearl Harbor as non-combatants as there was no state of war between the U.S. and Japan when the attack occurred. Joseph B. Keenan, the chief prosecutor in the Tokyo Trials, says that the attack on Pearl Harbor not only happened without a declaration of war but was also a treacherous and deceitful act. In fact, Japan and the U.S. were still negotiating for a possible peace agreement which kept U.S. officials very distracted when Japanese planes bombed Pearl Harbor. Keenan explained the definition of a war of aggression and the criminality of the attack on Pearl Harbor:
Naval Station Great Lakes
On 7 December 1941, Pearl Harbor was attacked by Japan, and around 6,000 sailors were training at Great Lakes. This grew to 68,000 in six months; by September 1942, over 100,000 sailors were training at Great Lakes. The base grew to in the next 10 months. By mid-1943, there were over 700 instructors at the Class A service schools.