Dear Ms. Greene,
Thank you for posting your request on History Hub!
We searched the National Archives Catalog and located World War II Command Files in the Records of the Office of the Chief of Naval Operations (Record Group 38) that includes Shore Establishments, ACORN 24; Shore Establishments, Combat Aircraft Support Unit (CASU); and may include command files for other organizations involved in the Admiralty Islands Campaign. We also located World War II War Diaries, Other Operational Records and Histories, ca. 1/1/1942 - ca. 6/1/1946 in Record Group 38 that includes ACORN 24 - War History and may include war diaries for other organizations involved in the Admiralty Islands Campaign. Additionally, we located World War II Action and Operational Reports in Record Group 38 that may include action reports for organizations involved in the Admiralty Islands Campaign.
Next, we located Muster Rolls of U.S. Navy Ships, Stations, and Other Naval Activities, 1/1/1939 - 1/1/1949 in the Records of the Bureau of Naval Personnel (Record Group 24) that includes Acorn 24, 12/6/43 to 10/1/45 and Acorn 24, 9/21/44 to 9/30/44. And we located World War II Casualty Reports, 1939 - 1945 in Record Group 24 that includes a file for ACORN 24.
Plus, we located 40 record series of the Seventh Fleet in the Records of Naval Operating Forces (Record Group 313) that may have information relating to the Admiralty Islands Campaign.
For more information about these records, please contact the National Archives at College Park - Textual Reference (RDT2) via email at Archives2reference@nara.gov.
Due to the COVID-19 pandemic and pursuant to guidance received from the Office of Management and Budget (OMB), NARA has adjusted its normal operations to balance the need of completing its mission-critical work while also adhering to the recommended social distancing for the safety of NARA staff. As a result of this re-prioritization of activities, you may experience a delay in receiving an initial acknowledgement as well as a substantive response to your reference request from RDT2. We apologize for this inconvenience and appreciate your understanding and patience.
Finally, we located an article entitled “Gamble at Los Negros: The Admiralty Islands Campaign, 29 February 1944” from the Naval History and Heritage Command (NHHC). You may wish to contact NHHC as well as the National Museum of the Pacific War and the National WWII Museum for more information.
We hope this is helpful. Best of luck with your family research!