Dear Mr. Bell,
Thank you for posting your request on History Hub!
In regards to military units assigned to support the conference, rosters for units serving in World War II from 1944 - 1946 were destroyed in accordance with Army disposition authorities. Morning reports for Army units from November 1, 1912 to 1959 are in the custody of the National Archives at St. Louis (RL-SL). For access to these records, please contact RL-SL via email at firstname.lastname@example.org.
We searched the National Archives Catalog and located 2 collections, 2 series, 52 file units, and 462 items regarding the Potsdam Conference. Some of these documents have been digitized and may be viewed online through the Catalog. For more information about records that are not digitized in the Catalog, please contact the reference unit listed in the Catalog descriptions.
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 various NARA reference units. We apologize for this inconvenience and appreciate your understanding and patience.
We hope this information is helpful.