Dear Mr. Hatfield,
Thank you for posting your request on History Hub!
We searched the National Archives catalog and located the series Organizational History Files, 1959-1973 in the Records of the U.S. Army, Pacific (Record Group 550) that includes a file unit titled Unit Histories, 187th Infantry Regiment. We also located the series Unit Histories, 1943-1967 in the Records of the U.S. Army Operational, Tactical, and Support Organizations (Record Group 338) that includes a file unit titled 187th Airborne Infantry Regiment: History. These histories may list the regimental commanders. For access to these records, please contact the National Archives at College Park - Textual Reference (RDT2) via email at firstname.lastname@example.org.
Photographs of various U.S. Army, Navy, and Marine Corps activities dating from 1940 to 2007 are in the custody of the National Archives at College Park - Still Picture (RDSS). Please contact RDSS via email at email@example.com and their web site is https://www.archives.gov/dc-metro/college-park/photographs-dc.html.
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 and RDSS. We apologize for this inconvenience and appreciate your understanding and patience.
We also searched the U.S. Army Center of Military History and located the lineage and honors of the 1/187th Infantry Regiment.
We hope this information is helpful. Best of luck with your research!