I am not all clear who "the Septics" are/were; it is not a term I have ever previously come across. If it is intended to refer to the USA, I would stress that the point is not that the USA refused to sign the Versailles Treaty, which it did (via President Woodrow Wilson), but that it refused to ratify it (via the Senate).
As for the links, I have tried the Avalon link several times by different routes, and all I can get, so far as the Versailles Treaty is concerned, is "page not found"; I can only speak as I find. The Sandiego link certainly gives the basic text of the Treaty, but, I repeat, it does not give the preamble, which, in any treaty, necessarily sets out the High Contracting Parties, and often much other information besides, nor does it set out the signatures and seals of the Parties at the end, together with date and place of signing. To that extent the claim of "the Complete Text" is misleading, to put it at its mildest. Still less does the weblink refer to any schedule of ratifications, or give any other information from which one can easily deduce the date of the Treaty coming into force. It is certainly not the standard of work I demand of myself when formally placing information in the public domain.
I fail to see the point of repeating the question why medals and memorials cite 1914-19, as I have already set out the rationale for the configuration deriving from the Vesailles Treaty, and Scrimnet has already confirmed his agreement with me on the point.
If I deemed it necessary to cite a Victory Medal link, I would avoid citing one which insults both medal holders and readers by putting "principle" in its top line instead of "principal". In such matters, I always take the view that if an author cannot even be bothered to get minor details right, how can he/she be trusted to get major details right?
As to the two further weblinks Scrimnet cites, it is for him to comment what he finds "wrong" about them. I have no quarrel with their general trend, but I am bound to repeat the purport of my previous paragraph that a timeline that publishes "squable" for "squabble" in its opening paragraph is not encouraging readers to take it seriously.