Final answer:
The 83rd Chemical Mortar Battalion was formed during World War II as part of the U.S. Army's specialized units, but the exact location of its formation requires historical records to determine.
Step-by-step explanation:
The 83rd Chemical Mortar Battalion (83D CM BN) has a unique formation history that dates back to World War II. Specifically, it was created as part of the United States Army's efforts to build specialized units. The exact location of the formation is not specified in the question, and it's important to note that detailed historical records would be required to determine the precise place of origin. However, the battalion played a significant role in several campaigns during the war, earning distinctions for its service.