Who is R.F. Shannon?

In one of the Creep's latest videos, an antique stuffed bunny rests on the edge of what appears to be an old munitions box stamped with the above insignia. The camera slowly pans in to this insignia.
Many people figured this to be a reference to a chemical weapons facility in Maryland. The numbers stand for the Korean War-era detachment this R.F. Shannon was a part of.