original_query: What is the significance of the Fort McKavett State Historic Site in Menard County, Texas?
query: What is the significance of the Fort McKavett State Historic Site in Menard County, Texas?
answer: Fort McKavett State Historic Site is a former US Army installation significant for its role in protecting migrants to California, its use by Confederate forces during the Civil War, and its later occupation by Buffalo Soldier regiments.  It's also historically significant for its connection to the town of Fort McKavett, Texas, and its preservation as a state historic site.