Walz is being exposed for what the Americans call 'stolen Valor'
When is the Vance ,Walz live debate?
To be accurate, he is being accused by Vance, Trump's running mate (who has also called Trump a cynical a-hole, a terrible candidate, noxious, America's Hitler but has now conveniently and sycophantically changed his mind), whom Waltz has recently called weird.
Trump's camp have previous in this tactic with their baseless attacks on military veterans such as Senator McCain, and before that on John Kerry, which do not go down with other military veterans.
The Trump/Vance approach seems, like yours, to consist of digging up mud, no matter how little it is based on fact, and chucking it around a lot hoping some of it sticks.