Was there anything else done at the site, like logging or farming? If so it might add more dimensions to the site. Why was the site chosen for a cavalry camp in the first place? In the area I live there was supposed to have been a cavalry raid because of the coal mines. This is about 6 miles as the crow flies from the Whitehouse of the Confederacy. That would cause items similar to what you found to appear when metal detecting with the added hazard of undocumented mine shafts several hundred feet deep.