Pearl Harbor Investigation

Knox Investigations (December 9 - 14, 1941)

Part IReport by the Secretary of the Navy to the President
Part IIBrief Report of Conduct of Naval Personnel during Japanese Attack, Pearl Harbor, T. H., December 7, 1941
Part IIIThe Japanese Attack on Pearl Harbor

Roberts Commssion (December 18 - January 23, 1941)

Roberts Report

Hart Investigation (February 12 - June 15, 1944)

IntroProceedings of the Hart Inquiry
Day 2Proceedings of the Hart Inquiry - Tuesday, March 7, 1944
Day 3Proceedings of the Hart Inquiry - Wednesday, March 8, 1944
Day 4Proceedings of the Hart Inquiry - Thursday, March 9, 1944
Day 5Proceedings of the Hart Inquiry - Friday, March 10, 1944
Day 6Proceedings of the Hart Inquiry - Saturday, March 11, 1944
Day 7Proceedings of the Hart Inquiry - Monday, March 13, 1944
Day 8Proceedings of the Hart Inquiry - Tuesday, March 14, 1944
Day 9Proceedings of the Hart Inquiry - Wednesday, March 15, 1944
Day 10Proceedings of the Hart Inquiry - Thursday, March 16, 1944
Day 11Proceedings of the Hart Inquiry - Saturday, March 18, 1944
Day 12Proceedings of the Hart Inquiry - Monday, March 20, 1944
Day 13Proceedings of the Hart Inquiry - Tuesday, March 21, 1944
Day 14Proceedings of the Hart Inquiry - Thursday, March 23, 1944
Day 15Proceedings of the Hart Inquiry - Saturday, March 25, 1944
Day 16Proceedings of the Hart Inquiry - Monday, March 27, 1944
Day 17Proceedings of the Hart Inquiry - Tuesday, March 28, 1944
Day 18Proceedings of the Hart Inquiry - Friday, March 31, 1944
Day 19Proceedings of the Hart Inquiry - Saturday, April 1, 1944
Day 20Proceedings of the Hart Inquiry - Monday, April 3, 1944
Day 21Proceedings of the Hart Inquiry - Tuesday, April 4, 1944
Day 22Proceedings of the Hart Inquiry - Wednesday, April 5, 1944
Day 23Proceedings of the Hart Inquiry - Thursday, April 6, 1944
Day 24Proceedings of the Hart Inquiry - Sunday, April 9, 1944
Day 25Proceedings of the Hart Inquiry - Monday, April 10, 1944
Day 26Proceedings of the Hart Inquiry - Wednesday, April 12, 1944
Day 27Proceedings of the Hart Inquiry - Thursday, April 13, 1944
Day 28Proceedings of the Hart Inquiry - Saturday, April 15, 1944
Day 29Proceedings of the Hart Inquiry - Monday, April 17, 1944
Day 30Proceedings of the Hart Inquiry - Wednesday, April 26, 1944
Day 31Proceedings of the Hart Inquiry - Thursday, April 27, 1944
Day 32Proceedings of the Hart Inquiry - Saturday, April 29, 1944
Day 33Proceedings of the Hart Inquiry - Wednesday, May 3, 1944
Day 34Proceedings of the Hart Inquiry - Thursday, May 4, 1944
Day 35Proceedings of the Hart Inquiry - Friday, May 5, 1944
Day 36Proceedings of the Hart Inquiry - Saturday, May 6, 1944
Day 37Proceedings of the Hart Inquiry - Wednesday, May 10, 1944
Day 38Proceedings of the Hart Inquiry - Thursday, May 11, 1944
Day 39Proceedings of the Hart Inquiry - Wednesday, May 24, 1944
Day 40Proceedings of the Hart Inquiry - Monday, June 5, 1944
Day 41Proceedings of the Hart Inquiry - Tuesday, June 6, 1944
Day 42Proceedings of the Hart Inquiry - Thursday, June 15, 1944
Exhibit 1Letter from Admiral Hart to Admiral Kimmel of February 17, 1944.
Exhibit 2Letter from Admiral Kimmel to Admiral Hart of February 19, 1944.
Exhibit 3Letter from Admiral Hart to Admiral Kimmel of March 4, 1944.
Exhibit 4Pacific Fleet Confidential Letter 2CL-1 (Revised). Security of Fleet at Base and in Operating Areas.
Exhibit 5Joint Coastal Frontier Defense Plan, Hawaiian Coastal Frontier and Fourteenth Naval District. (HCF 41 - 14ND-JCD-42).
Exhibit 6Dispatch: CNO to CINCPAC: October 16, 1941; Reference 162203
Exhibit 7Dispatch: CNO to CINCPAC; November 24, 1941; Reference 242005
Exhibit 8Dispatch: CNO to CINCPAC: November 27, 1941; Reference 272337
Exhibit 9CNO to COM PNNCF; November 28, 1941; Reference 290110
Exhibit 10OpNav to CINCAF; November 30, 1941; Reference 300419
Exhibit 11Dispatch: OpNav to CINPAC; December 3, 1941; Reference 031850
Exhibit 12Dispatch: CNO to CINCPAC; November 26, 1941; Reference 270038
Exhibit 13Dispatch: CNO to CINCPAC; November 26, 1941; Reference 270040
Exhibit 14Dispatch: CNO to CINCPAC; November 29, 1941; Reference 282054
Exhibit 15Dispatch: CNO to OpNav; November 28, 1941; Reference 280627
Exhibit 16U.S. Pacific Fleet Operating Plan Rainbow Five.
Exhibit 17Letter from CNO to CINCPAC of Feburary 15, 1941. Anti-torpedo baffles for protection against torpedo plane attacks, Pearl Harbor.
Exhibit 18Letter from CINCPAC to CNO of March 12, 1941. Anti-torpeodo baffles for protection against torpedo plane attacks, Pearl Harbor.
Exhibit 19Letter from CNO to Com 14 of June 13, 1941. Anti-torpedo baffles for protection against torpedo plane attacks.
Exhibit 20Letter from Admiral Hart to Admiral Kimmel of March 10, 1944.
Exhibit 2114CL-41 (Revised). Organization of Pacific Fleet into Task Forces. October 31, 1941.
Exhibit 22Letter from Com 14 to CNO with enclosure of Joint Estimate of March 31, 1941, dated May 1, 1941.
Exhibit 23Letter from Com 14 to CNO of December 30, 1940. Security of Fleet and ability of local defenses to meet suprise attacks.
Exhibit 24Letter from ComPatWingTwo to CNO of January 16, 1941. Readiness of ComPatWingTwo.
Exhibit 25Letter from CominCPacFlt of February 13, 1941. Employment Schedules, Second Quarter, Fiscal Year, 1942.
Exhibit 26Letter from CominCPacFlt of November 10, 1941. Employment Schedules, Third Quarter, Fiscal Year, 1942.
Exhibit 27Letter from Commander Task Force One to Task Force One of September 13, 1941. Employment Schedule, Task Force One, U.S. Pacific Fleet, Second Quarter, 1942.
Exhibit 28Letter from Commander Task Force Two to Task Force Two of September 12, 1941. Employment Schedule, Task Force Two, U.S. Pacific Fleet, Second Quarter, 1942.
Exhibit 29Letter from Commander Task Force Three to Task Force Three of September 11, 1941. Schedule of Employment, Task Force Three for the period October 1, 1941-December 31, 1941.
Exhibit 30Verification Letter for Vice Admiral Bellinger dated March 16, 1944.
Exhibit 31Letter from Admiral Hart to Admiral Kimmel of March 22, 1944.
Exhibit 32Letter from District Attorney to Attorney General; Hawaii; June 4, 1941.
Exhibit 33Verification Letter for Commander Rochefort dated April 5, 1944.
Exhibit 34Verification Letter for Vice Admiral Turner dated April 5, 1944.
Exhibit 35Verification Letter for Captain McCrea dated April 6, 1944.
Exhibit 36Letter from Admiral Hart to Admiral Kimmel of April 24,1944.
Exhibit 37Verification Letter for Rear Admiral Kingman dated April 17, 1944.
Exhibit 38Verification Letter for Vice Admiral Leary dated May 6, 1944.
Exhibit 39State Department publication: Peace and War, 1931-1941.
Exhibit 40Letter from SecNav to SecWar of January 24, 1941; and reply from SecWar to SecNav of February 7, 1941. Security of the U.S. Pacific Fleet while in Pearl Harbor.
Exhibit 41Verification Letter for Rear Admiral Bunkley dated June 6, 1944.
Exhibit 42Verification Letter for Admiral Ingersoll dated June 9, 1944.

Army Pearl Harbor Board (July 20 - October 20, 1944)

Chapter IPreamble: Authority for the Army Pearl Harbor Board and its Action Taken
Chapter IIBackground
Chapter IIIThe Story of Pearl Harbor
A. General
B. Events from January throught September 1941.
C. Critical Period: October 1 to December 7, 1941.
D. Status of the Principal Hawaiian Defenses in 1941 and their State of Readiness on December 6, 1941, or the Reasons for their Lack of Readiness.
E. Status of Defenses on Sunday Morning, December 7, 1941.
Chapter IVResponsibilities in Washington
Chapter VWyman and Construction Delays in Hawaii
Chapter VIConclusions
Chapter VIIRecommendations

Navy Court of Inquiry (July 24 - October 19, 1944)

IntroIntroduction from Report of Navy Court of Inquiry
ReportReport of Navy Court of Inquiry
AddendumAddendum to Court's Finding of Facts
Endorsement IFirst Endorsement - November 2, 1944
Endorsement IISecond Endorsement - November 6, 1944
Endorsement IIIThird Endorsement - December 1, 1944
Endorsement IVFourth Endorsement - August 13, 1945

Clarke Investigation (August 4 - September 20, 1944)

Clark Investigation
MemoMemorandum for the Chief of Staff dated August 17, 1945 and Memorandum for the Chief of Staff dated August 13, 1945
Testimony ofColonel John T. Bissell (September 14, 1944, August 4, 1945)
Colonel Rufus S. Bratton
Colonel Edward F. French
William F. Friedman ([[[phclarkefriedman916|September 16, 1944, July 13, 1945)
Major General L. T. Gerow
Brigadier General Hayes A. Kroner
Major General Sherman Miles
Lieutenant Robert H. O'Dell
Colonel Otis K. Sadtler (September 16, 1944, July 14, 1945)
Major General Ralph C. Smith
Brigadier General Isaac Spalding
Round Table Discussion (September 14, 1944)
ExhibitsExhibit 1
Exhibit 2
Exhibit 3
Exhibit 4
Exhibit 5
Exhibit 6
Exhibit 7
Exhibit 8

Joint Committee on the Investigation of the Pearl Harbor Attack (July 16, 1946)

IndexInvestigation of the Pearl Harbor Attack
IntroIntroductory Statement
Part IDiplomatic Background of the Pearl Harbor Attack
Part IIThe Japanese Attack and its Aftermath
Part IIIResponsibilities in Hawaii
Part IVResponsibilities in Washington
Part VConclusions and Recommendations
Appendix APrior Investigations Concerning the Pearl Harbor Attack
Appendix B- the Attack Along with the Leading Witnesses in the Various Proceedings
Appendix CCommunications From the President of the United States Relating to the Pearl Harbor Investigation
Appendix DReview of the Diplomatic Conversations Between the United States and Japan, and Related Matters, From the Atlantic Conference in August, 1941 Through December 8, 1941
Appendix EThe "Winds Code"
Appendix FGeographical Considerations and Navy and Army Installations