Justifying massive military expenditures and a program of universal conscription isn’t easy in a time of peace, but the Swiss military has managed to keep it up even though they don’t face any conceivable military threats, and indeed haven’t faced any in decades.
But being the head of a conscript military with no enemies is kind of boring, so at least for the sake of wargames, they had to make one up.
So get this: France has split up into multiple warring statelets, and somehow the Duchy of Burgundy is independent for the first time since 1477 and falls on hard economic times. And they’re pretty sure it’s Switzerland’s fault, because banks.
So a totally fictional militant faction, the Brigade Libre Dijonnais (BLD), based in the totally fictional future statelet of Saonia, which is named after the Saone river but is itself based on the borders of an ancient duchy, invades Switzerland outright, with an eye on robbing banks.
Swiss officials defended the wargame, saying that maintaining the nation’s military credibility required preparing for the “threats of the 21st century.” In practice, it seems the wargame centers more on the threats of the mid-15th century.