It did, though the German army was collapsing on the Western Front, and the German Empire itself collapsed before the armistice on November 11th 1918. The Dolchstosslegende in some respects resembles the Lost Cause of the South, which still has potency some 160 years later (hence VP Vance).
And, of course, the Korean War never officially ended.
And there was that famous negotiation that ended the Vietnam War...
A good illustration of what happens to an ally when the US withdraws military support and provides a private security guarantee.
Also what happens when you have a vast bureaucracy that can't imagine the end of its world discontinuednotes.com/2025/04/16/l...
The prototype for all failed western interventions was of course the Russian Civil War 1918-21. discontinuednotes.com/2021/08/31/j...