Dandenong-Cranbourne RSL treasurer John Filmer, the first to suspect Gibbons' war stories were lies, was pleased that he had been sentenced.

"It might be a worry to other wannabes because this has not only distressed our boys who fought, but even more so the widows of more than 500 servicemen who served in Vietnam.

"What this will do is set a precedent to other wannabes. We're aware of three others under scrutiny in Melbourne."

The Australian & New Zealand Military Imposters organisation, which outs proven wannabes on its website, hailed the jail term as a step in the right direction.

An ANZMI spokesman, who only wanted to be identified as Rodney, said the maximum jail term of six months would have been appropriate for Gibbons.

"How dare some a---hole prance around with a chestful of medals.

"It doesn't cut the mustard with the rest of us."

Rodney said younger fakers, claiming to have fought in East Timor, Iraq, Afghanistan and Rwanda, were now appearing.