Dear Ms. Stankiwicz,
Thank you for posting your request on History Hub!
If you are researching the 7th Infantry Regiment, records of this unit may be found in the Records of the 1st Through 338th and the 559th Infantry Regiment, 1916-1921 in the Records of U.S. Regular Army Mobile Units (Record Group 391). If you are researching the 7th Division, which was later renamed the 7th Infantry Division, records of this unit may be found in the Records of Divisions, 1917 - 1920 in the Records of the American Expeditionary Forces (World War I) (Record Group 120). These records are not online. For more information about 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 RDT2. We apologize for this inconvenience and appreciate your understanding and patience.
The U.S. Army Heritage & Education Center, 950 Soldiers Drive, Carlisle, PA 17013, has a large collection of published unit histories. Also, the U.S. Army Center of Military History and the National World War I Museum may be able to assist you in your research.
Information about the 7th Division during World War I is published in the book Summary of Operations in the World War: 7th Division. The 7th Infantry Regiment was assigned to the 3rd Division. Information about the 3rd Division is published in the book Summary of Operations in the World War: 3d Division.
We hope this is helpful. Best of luck with your research!