Browsing through "The Price of Glory," I came across the section where Grayson finds the Nagayan Mountain 'Mech cache. He notes that, alongside Star League 'Mechs, there are also dozens of tanks, including Vedettes and Demolishers.
Since more recent materials indicate Vedettes debuted in 2943 and Demolishers in 2823, does that indicate that some unknown caretaker(s) added to the stockpile during the Succession Wars, or should we just mentally replace those references with, say, "Demons" and "Rhinos," or other equipment from the 2780s?
(I personally lean towards the former, given the extra layer of story potential it adds)