No American military engagement has undergone more post-mortems than the Japanese attack on Pearl Harbor. Between 1941 and 1946, various departments of the U.S. government conducted nine official inquiries. A tenth inquiry was held as recently as 1995, when the Department of Defense re-examined the culpability placed on Rear Admiral Husband E. Kimmel and Major General Walter C. Short for a lack of preparedness prior to the Japanese attack on Pearl Harbor. The investigation, issued as the Dorn Report, absolved Kimmel and Short of responsibility for the devastation caused by the attack and recommended posthumously restoring Kimmel and Short to the ranks they held prior to the attack.