Dear Mr. Reich,
Thank you for posting your question on History Hub!
We searched the National Archives Catalog for “Ordnance Technical Intelligence” and located 5 series and 26 file units for the 1940-1949 time period. We also located 5 series, 506 file units, and 4 items relating to “T-Force” for the 1940-1949 time period. Please note that some of the records have been digitized and may be viewed online using the Catalog. For access to non-digitized records, please contact the reference unit listed in the description.
In addition, we located 61 series in the Records of U.S. Army Operational, Tactical, and Support Organizations (World War II and Thereafter) (Record Group 338) that pertain to the Seventh Army during WWII. Further, we located the World War II Operations Reports, 1940-1948 in the Records of the Adjutant General's Office, 1917-1985 (Record Group 407) that may include records of the 6th Army Group, Seventh Army, 54th Ordnance Technical Intelligence Team, and 6890th Intelligence Assault Force. For access to these records, please contact the National Archives at College Park - Textual Reference (RDT2) via email at firstname.lastname@example.org.
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 units. We apologize for this inconvenience and appreciate your understanding and patience.
Lastly, we suggest that you review two other resources that we located online. The first one is the publication titled United States Army in World War II. The Technical Services. The Ordnance Department: On Beachhead and Battlefront by Lida May available on the website of the U.S. Army Center of Military History. The second one is titled History of Ordnance Technical Intelligence in World War II, Part I: History, Orders & Circulars, and Publicity and can be accessed on Digital Commons at the University of Nebraska-Lincoln.
We hope this is helpful. Best of luck with your research!