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Dear Mr. Neidlein,
Thank you for contacting the History Hub!
The Textual Reference Archives II Branch (RDT2) at the National Archives in College Park has custody of the WWII Operations Reports in the Records of the Adjutant General's Office, 1917- that include records of the 254th Infantry Regiment and the 117th Cavalry Squadron. These records may contain the information you seek. Please contact RDT2 via email at firstname.lastname@example.org.
We hope this information is helpful. Best of luck with your research!